diff --git a/Build/composer/composer.dist.json b/Build/composer/composer.dist.json
index 918b4dc51eefa4f14738cc25382dead3345e59c5..6ab12ea1d6ac347fad61d4db2e8ea52a9383d2c0 100644
--- a/Build/composer/composer.dist.json
+++ b/Build/composer/composer.dist.json
@@ -16,40 +16,40 @@
 			"url": "../../typo3/sysext/*",
 			"options": {
 				"versions": {
-					"typo3/cms-backend": "12.4.21-dev",
-					"typo3/cms-core": "12.4.21-dev",
-					"typo3/cms-extbase": "12.4.21-dev",
-					"typo3/cms-extensionmanager": "12.4.21-dev",
-					"typo3/cms-filelist": "12.4.21-dev",
-					"typo3/cms-fluid": "12.4.21-dev",
-					"typo3/cms-frontend": "12.4.21-dev",
-					"typo3/cms-install": "12.4.21-dev",
-					"typo3/cms-adminpanel": "12.4.21-dev",
-					"typo3/cms-belog": "12.4.21-dev",
-					"typo3/cms-beuser": "12.4.21-dev",
-					"typo3/cms-dashboard": "12.4.21-dev",
-					"typo3/cms-felogin": "12.4.21-dev",
-					"typo3/cms-filemetadata": "12.4.21-dev",
-					"typo3/cms-fluid-styled-content": "12.4.21-dev",
-					"typo3/cms-form": "12.4.21-dev",
-					"typo3/cms-impexp": "12.4.21-dev",
-					"typo3/cms-indexed-search": "12.4.21-dev",
-					"typo3/cms-info": "12.4.21-dev",
-					"typo3/cms-linkvalidator": "12.4.21-dev",
-					"typo3/cms-lowlevel": "12.4.21-dev",
-					"typo3/cms-opendocs": "12.4.21-dev",
-					"typo3/cms-recycler": "12.4.21-dev",
-					"typo3/cms-redirects": "12.4.21-dev",
-					"typo3/cms-reports": "12.4.21-dev",
-					"typo3/cms-rte-ckeditor": "12.4.21-dev",
-					"typo3/cms-scheduler": "12.4.21-dev",
-					"typo3/cms-seo": "12.4.21-dev",
-					"typo3/cms-setup": "12.4.21-dev",
-					"typo3/cms-sys-note": "12.4.21-dev",
-					"typo3/cms-t3editor": "12.4.21-dev",
-					"typo3/cms-tstemplate": "12.4.21-dev",
-					"typo3/cms-viewpage": "12.4.21-dev",
-					"typo3/cms-workspaces": "12.4.21-dev"
+					"typo3/cms-backend": "12.4.21",
+					"typo3/cms-core": "12.4.21",
+					"typo3/cms-extbase": "12.4.21",
+					"typo3/cms-extensionmanager": "12.4.21",
+					"typo3/cms-filelist": "12.4.21",
+					"typo3/cms-fluid": "12.4.21",
+					"typo3/cms-frontend": "12.4.21",
+					"typo3/cms-install": "12.4.21",
+					"typo3/cms-adminpanel": "12.4.21",
+					"typo3/cms-belog": "12.4.21",
+					"typo3/cms-beuser": "12.4.21",
+					"typo3/cms-dashboard": "12.4.21",
+					"typo3/cms-felogin": "12.4.21",
+					"typo3/cms-filemetadata": "12.4.21",
+					"typo3/cms-fluid-styled-content": "12.4.21",
+					"typo3/cms-form": "12.4.21",
+					"typo3/cms-impexp": "12.4.21",
+					"typo3/cms-indexed-search": "12.4.21",
+					"typo3/cms-info": "12.4.21",
+					"typo3/cms-linkvalidator": "12.4.21",
+					"typo3/cms-lowlevel": "12.4.21",
+					"typo3/cms-opendocs": "12.4.21",
+					"typo3/cms-recycler": "12.4.21",
+					"typo3/cms-redirects": "12.4.21",
+					"typo3/cms-reports": "12.4.21",
+					"typo3/cms-rte-ckeditor": "12.4.21",
+					"typo3/cms-scheduler": "12.4.21",
+					"typo3/cms-seo": "12.4.21",
+					"typo3/cms-setup": "12.4.21",
+					"typo3/cms-sys-note": "12.4.21",
+					"typo3/cms-t3editor": "12.4.21",
+					"typo3/cms-tstemplate": "12.4.21",
+					"typo3/cms-viewpage": "12.4.21",
+					"typo3/cms-workspaces": "12.4.21"
 				}
 			}
 		},
diff --git a/typo3/sysext/adminpanel/composer.json b/typo3/sysext/adminpanel/composer.json
index f334d49c5cfdb6c8cd7d3a836c42cc79f7e7c286..b4fba59fa0cde71fe9a47fd56b6b40a05a9159d8 100644
--- a/typo3/sysext/adminpanel/composer.json
+++ b/typo3/sysext/adminpanel/composer.json
@@ -23,10 +23,10 @@
 		"psr/http-server-handler": "^1.0",
 		"psr/http-server-middleware": "^1.0",
 		"symfony/var-dumper": "^6.4 || ^7.0",
-		"typo3/cms-backend": "12.4.*@dev",
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-fluid": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev",
+		"typo3/cms-backend": "12.4.21",
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-fluid": "12.4.21",
+		"typo3/cms-frontend": "12.4.21",
 		"typo3fluid/fluid": "^2.9.2"
 	},
 	"conflict": {
diff --git a/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_items/composer.json b/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_items/composer.json
index bd77f875881afc3b377dd7553bf43e6212802108..3167227fbc3116b537f131f3fd1c9fd26860ead9 100644
--- a/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_items/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_items/composer.json
@@ -4,7 +4,7 @@
 	"description": "TcaSelectItems Test",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_tree_items/composer.json b/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_tree_items/composer.json
index 8a20e15e145d2bf1b04cde84e5310ed92c7e46e3..90d1a44bfeecc381133144562c82474363d12ccd 100644
--- a/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_tree_items/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/Fixtures/Extensions/test_tca_select_tree_items/composer.json
@@ -4,7 +4,7 @@
 	"description": "TcaSelectTreeItems Test",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_first/composer.json b/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_first/composer.json
index a383f7cf3eb2cbfba799e99c8694fa2135dd4dc9..92d5e49a3f930bcff3339a32831770cba9f0b7f2 100644
--- a/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_first/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_first/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for site config override",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_second/composer.json b/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_second/composer.json
index 7de1a78ad3b56b85c474ef12077b321a13661ae0..14a6585265cf571ac41e8cd173b60e045989e2d4 100644
--- a/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_second/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/SiteConfiguration/Fixtures/Extensions/test_configoverride_second/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for site config override",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3tests/config-override-first": "12.4.*@dev"
diff --git a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_a/composer.json b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_a/composer.json
index 3b95e1773a1e6f64b490fbe5693da9de545cc335..ae173eeb11a1e1857a43f11444662847bacb571b 100644
--- a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_a/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_a/composer.json
@@ -2,7 +2,7 @@
 	"name": "typo3tests/cms-test-templates-a",
 	"type": "typo3-cms-extension",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_b/composer.json b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_b/composer.json
index 503abaa72c69b3c46072d07734882c7b1f49b566..e9e4b99f97b5dd65d50f9e3e32924cd97193be18 100644
--- a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_b/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_b/composer.json
@@ -2,7 +2,7 @@
 	"name": "typo3tests/cms-test-templates-b",
 	"type": "typo3-cms-extension",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_c/composer.json b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_c/composer.json
index 3d1d76dcf4318a9905dc3e55366517e276190921..350b44fec411c05b02ca1d5473ab7a94b03cbd29 100644
--- a/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_c/composer.json
+++ b/typo3/sysext/backend/Tests/Functional/View/Fixtures/Extensions/test_templates_c/composer.json
@@ -2,7 +2,7 @@
 	"name": "typo3tests/cms-test-templates-c",
 	"type": "typo3-cms-extension",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/backend/composer.json b/typo3/sysext/backend/composer.json
index 22018004c899f1f3208168d3061b0fa51e205afa..2ce73adedae78bcda7231d0c78344a9f27b8b783 100644
--- a/typo3/sysext/backend/composer.json
+++ b/typo3/sysext/backend/composer.json
@@ -20,7 +20,7 @@
 	},
 	"require": {
 		"psr/event-dispatcher": "^1.0",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-install": "To generate url to install tool in environment toolbar"
diff --git a/typo3/sysext/belog/composer.json b/typo3/sysext/belog/composer.json
index b15f9d2ed9bf54ade170ad9319a0a26cc764df57..e404de496ac77295d2da36a3eb0f9c72e7c5a7f3 100644
--- a/typo3/sysext/belog/composer.json
+++ b/typo3/sysext/belog/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/beuser/composer.json b/typo3/sysext/beuser/composer.json
index 024950edbb71db1b09ce4037661b2c11240f2b9a..93fe30393280ef05d6658e9eb42a59580a7b832b 100644
--- a/typo3/sysext/beuser/composer.json
+++ b/typo3/sysext/beuser/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/core/Classes/Information/Typo3Version.php b/typo3/sysext/core/Classes/Information/Typo3Version.php
index d4cd49e2d0e2b0fbdbc0e609e43ff2947c9bb246..7ccbba59dfe00230e5b41508211929f9a5c43fc6 100644
--- a/typo3/sysext/core/Classes/Information/Typo3Version.php
+++ b/typo3/sysext/core/Classes/Information/Typo3Version.php
@@ -19,7 +19,7 @@ namespace TYPO3\CMS\Core\Information;
 
 class Typo3Version
 {
-    protected const VERSION = '12.4.21-dev';
+    protected const VERSION = '12.4.21';
     protected const BRANCH = '12.4';
 
     public function getVersion(): string
diff --git a/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/composer.json b/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/composer.json
index 8a4fcd9413ca8f1f1c53841cab4febc9c550cacc..c7c6c35969e6df16bc328590819383280a753844 100644
--- a/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Cache/Core/Fixtures/Extensions/aliases_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test_tca/composer.json b/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test_tca/composer.json
index aea621a4c4ef7975ead1a2c4dc5f6aba60873018..dee23f3575006d3450a7c9438293241a885a4196 100644
--- a/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test_tca/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Category/Collection/Fixtures/Extensions/test_tca/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/composer.json b/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/composer.json
index 72cdf1e0e216a4ad8c98467043939140d6be5989..2d60f56bc2f17e8bca1a9f84610d937b6d0f0881 100644
--- a/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Database/Fixtures/Extensions/test_expressionbuilder/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/composer.json
index 1c1b01bdaa577dc0b1e14f12f59db5a5c60aeb3c..7ad59d4a332ba92bdee6f030ae51e75cd257ba3b 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/irre_tutorial/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/composer.json
index 2b84849bebb58c9884abf82ac6f533f77afdda5a..2f7ea2d0f159db083ffd95e641d0e566d06a2980 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler_slug/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler_slug/composer.json
index 9d8606e338aa1bdae4b6df64824e30ff17e8996f..268cdaf584553f451e4ad650e19be70eabeef330 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler_slug/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_datahandler_slug/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_di/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_di/composer.json
index 0f972a72b331eca177e947baf6c03e8a15ed2f22..653c3ae50f15199c59b00dd55c8f38bddb63e062 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_di/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_di/composer.json
@@ -4,7 +4,7 @@
 	"description": "This extension contains dependency injection fixtures.",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/composer.json
index 671f6bd1d44c5adf722e2f8125228cca13d2771f..5008487d64d06617ef562f2ec7c99160fedbae49 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_eid/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_flex_section_container/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_flex_section_container/composer.json
index a37c709b1852079e7404d77d07184d37b35a4c78..8a28d418924aafa7d83e9c607cc3028e4942cd5f 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_flex_section_container/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_flex_section_container/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/composer.json
index 8a6ddb34250b6de60f3bd5831707c7f7052a2b0f..14c9ece07e61f1ec5f0bb5b0d9e84f6cb28ee148 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_fluid_email/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/composer.json
index b929ea0306e8a35c7335cffa97b395aa8fbc236c..a1182c491a38e9d1ac5ba27302caae3d87d1876f 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_csv/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield/composer.json
index c27d1a148f960228f517572067ddf964e6fdc8fe..c050e7aa2f35597c6dc4de63739e230be3a455df 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield_non_ws/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield_non_ws/composer.json
index 9d577204f69fa1eac70d801d7f4ffda2d7754f8a..12eb37ed69c701e48ee4ba053de7a78c54707778 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield_non_ws/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield_non_ws/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mm/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mm/composer.json
index d77440d440fdcc983675f1a3e2c0dfc1e080b348..2b57d293c877ddacedc0ff988343891bb6c93851 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mm/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mm/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributeinline/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributeinline/composer.json
index b921937c7a09d180ebec0286a348b2e976e5918e..e56b170e5133721a37e0ae0e5894489f43d22925 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributeinline/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributeinline/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributesimple/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributesimple/composer.json
index e88e69d34b76335d5e4438dbcf631b2d73b73ab7..78fb23c61bfda1e45e5cb4bc842792fb291782ad 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributesimple/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnattributesimple/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnsymmetric/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnsymmetric/composer.json
index 5fb9af10684e22e3771bdfe68f344307750fa1c3..c34fd077b4845f40c670b8afd1f257d3160e9089 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnsymmetric/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_mnsymmetric/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/composer.json
index c364068e7a6d5ce768994be7aadf201b4eb6a49f..64b153dd7f0bf4c7ffc3655a9a81e850c8da812b 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_localization/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_logger/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_logger/composer.json
index 91bad479b882c5f92d113aef8b9133cd30757981..a3982df886865db74f7db050e76e535ef4dda37c 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_logger/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_logger/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/composer.json
index ae546467a65b778a7aa1c87636b40cc8302e1ee1..acb4b659cd274393814b64c911638c885c58bd2a 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_meta/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/composer.json
index a96686172bf00c826e9e7c6744d226fa791db208..e6e5180998944b39621443455a29ac3aa62c6101 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_resources/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/composer.json
index faf7aa72b3b2bbd5e5b246eb6cf301766eb3a5a1..812615c0781a46203f759bbb86fec19e461d24e0 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_select_flex_mm/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_ast_function_event/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_ast_function_event/composer.json
index 4bcebafb26d7b9a0d73a6e9df11df4b9f3d27b8f..3b0c28a2367db117740a9b88deb9bbf258d8eb38 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_ast_function_event/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_ast_function_event/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_pagetsconfigfactory/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_pagetsconfigfactory/composer.json
index 923e4f2d866324fea5433258b17f685573fe505c..65b0c0bde77a05f888943471b24749cb3b5b0e90 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_pagetsconfigfactory/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_pagetsconfigfactory/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_usertsconfigfactory/composer.json b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_usertsconfigfactory/composer.json
index 7182ef95cda47de84477ffe8261f274fa5b52982..6b757fccdfc1adecab3a228658721735a7a09eef 100644
--- a/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_usertsconfigfactory/composer.json
+++ b/typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_typoscript_usertsconfigfactory/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for core",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/dashboard/composer.json b/typo3/sysext/dashboard/composer.json
index 6f97de183717e8ccaf7bd0a40189b64d37228ab9..4cbd7667f96870abc806be445b0467bce22aec09 100644
--- a/typo3/sysext/dashboard/composer.json
+++ b/typo3/sysext/dashboard/composer.json
@@ -19,11 +19,11 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev",
-		"typo3/cms-backend": "12.4.*@dev",
-		"typo3/cms-fluid": "12.4.*@dev",
-		"typo3/cms-extbase": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-frontend": "12.4.21",
+		"typo3/cms-backend": "12.4.21",
+		"typo3/cms-fluid": "12.4.21",
+		"typo3/cms-extbase": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/composer.json
index 43014ceeeb0e70891184cfb83a4e8a02b4f19922..1152787ab823620dbd0e4c572a0158fe4760c76f 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/blog_example/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/label_test/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/label_test/composer.json
index 3ba3290675e643d2f6deb8a2f99ce52cd44c9426..679445874fdcd4320011dc8cb205c15662622581 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/label_test/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/label_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/parent_child_translation/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/parent_child_translation/composer.json
index b4ab9c6e7d1b8068a7a4131734f319730ba8d0f6..6629cda64b5f66279723213e25c0c3e9cc4cd3c7 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/parent_child_translation/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/parent_child_translation/composer.json
@@ -4,7 +4,7 @@
     "description": "Test extension for Forge issue #92768",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
     "autoload": {
         "psr-4": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_data_mapper/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_data_mapper/composer.json
index 064778180255694a4e1d013f4a8d95d7bb908e22..3a3cdce394226f0ad3ec68825389918c6eb5fc7a 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_data_mapper/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_data_mapper/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_validators/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_validators/composer.json
index 61bfeb8aaefc16602fca57470872ca756f1e06fc..33b652750cf368777725707af926e90e51d00474 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_validators/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/test_validators/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/type_converter_test/composer.json b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/type_converter_test/composer.json
index 2420dffa982030b2bb02b39507c8a637b51ac126..2339dd751fe8e30742a75b676b94323b73271281 100644
--- a/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/type_converter_test/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Fixtures/Extensions/type_converter_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/composer.json b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/composer.json
index fa80c2e298e0367178192dc97afd007ef096c10f..b3cec5718c4952ad08ee500c6b3691bf42d9048c 100644
--- a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_argument_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/composer.json b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/composer.json
index e3bdbcbddf0f5ae603bc5a30f1c0caee044471d8..25d6e97f89fbf4d80c1997461096340854af4eb5 100644
--- a/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/composer.json
+++ b/typo3/sysext/extbase/Tests/Functional/Mvc/Controller/Fixture/Extension/action_controller_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "A test extension for extbase",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/extbase/composer.json b/typo3/sysext/extbase/composer.json
index 02c86c2b8bf81544f48d635918212050a135d68c..9bf3897d33fa2a8093b1a36a0fc3099d1977003f 100644
--- a/typo3/sysext/extbase/composer.json
+++ b/typo3/sysext/extbase/composer.json
@@ -25,7 +25,7 @@
 		"symfony/dependency-injection": "^6.4 || ^7.0",
 		"symfony/property-access": "^6.4 || ^7.0",
 		"symfony/property-info": "^6.4 || ^7.0",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Additional scheduler tasks"
diff --git a/typo3/sysext/extensionmanager/composer.json b/typo3/sysext/extensionmanager/composer.json
index 31a839e2f02f2ed6daf56de79de75f2e84884d4c..1cb217a702304462dafe6c02b697191570f66fd6 100644
--- a/typo3/sysext/extensionmanager/composer.json
+++ b/typo3/sysext/extensionmanager/composer.json
@@ -20,7 +20,7 @@
 	},
 	"require": {
 		"ext-libxml": "*",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/felogin/composer.json b/typo3/sysext/felogin/composer.json
index 3450c09e5a5b9041d9a386a97adea847ef1a42d5..288fee3d011ebb82a26001d42f16a6dcf24b408e 100644
--- a/typo3/sysext/felogin/composer.json
+++ b/typo3/sysext/felogin/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/filelist/composer.json b/typo3/sysext/filelist/composer.json
index 296e904a2a181ea01c325df1cd06879166b4aba3..c2d038637c61644883956002ea624dc653f61276 100644
--- a/typo3/sysext/filelist/composer.json
+++ b/typo3/sysext/filelist/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/filemetadata/composer.json b/typo3/sysext/filemetadata/composer.json
index e9060d60bf09e6f56242757cfd311b4ab7de3622..7738bf66ba696c50be82722686bc6a8717e195c5 100644
--- a/typo3/sysext/filemetadata/composer.json
+++ b/typo3/sysext/filemetadata/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
index b0cf41ff6f4fadb4c7547d0eb99f403a70e519c5..cfcb4914a6332273562d8c3ad79577c7c45ec8df 100644
--- a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
+++ b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/composer.json
@@ -4,7 +4,7 @@
 	"description": "Some Fluid rendering tests",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/test_translate/composer.json b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/test_translate/composer.json
index f5f7ae41bc2cda7f7d8f373db41bb3f958d6d88b..48db41ee254da3289a69bdce2b84b36221097b2d 100644
--- a/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/test_translate/composer.json
+++ b/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/test_translate/composer.json
@@ -4,7 +4,7 @@
 	"description": "Test translate view helper",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/typo3/sysext/fluid/composer.json b/typo3/sysext/fluid/composer.json
index 1e8b5fc9b32195c89964b057f99ece34d4a870e9..f988c6c748c1638df3bf7a063ad01e43477d11cf 100644
--- a/typo3/sysext/fluid/composer.json
+++ b/typo3/sysext/fluid/composer.json
@@ -20,8 +20,8 @@
 	},
 	"require": {
 		"symfony/dependency-injection": "^6.4 || ^7.0",
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-extbase": "12.4.*@dev",
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-extbase": "12.4.21",
 		"typo3fluid/fluid": "^2.9.2"
 	},
 	"conflict": {
diff --git a/typo3/sysext/fluid_styled_content/composer.json b/typo3/sysext/fluid_styled_content/composer.json
index 0739ace77ecaa20f1629b38a544946950eb185cf..807f2a83f7d6fa0af51710ca5accb8b8d6359a69 100644
--- a/typo3/sysext/fluid_styled_content/composer.json
+++ b/typo3/sysext/fluid_styled_content/composer.json
@@ -19,9 +19,9 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-fluid": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-fluid": "12.4.21",
+		"typo3/cms-frontend": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/form/Tests/Functional/RequestHandling/Fixtures/Extensions/form_caching_tests/composer.json b/typo3/sysext/form/Tests/Functional/RequestHandling/Fixtures/Extensions/form_caching_tests/composer.json
index 210ad74f69efe7cabef6365db1e9c04ddc1e46d6..9bfb9638d10b29401869028d9875f101391f0c4a 100644
--- a/typo3/sysext/form/Tests/Functional/RequestHandling/Fixtures/Extensions/form_caching_tests/composer.json
+++ b/typo3/sysext/form/Tests/Functional/RequestHandling/Fixtures/Extensions/form_caching_tests/composer.json
@@ -4,7 +4,7 @@
 	"description": "",
 	"license": ["GPL-2.0-or-later"],
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/typo3/sysext/form/Tests/Functional/Service/Fixtures/Extensions/form_labels/composer.json b/typo3/sysext/form/Tests/Functional/Service/Fixtures/Extensions/form_labels/composer.json
index 7b98c087beae4639a4daff104ff62464c685efba..8ad959ad1fa480fbabe001962ed413cc7ad854ba 100644
--- a/typo3/sysext/form/Tests/Functional/Service/Fixtures/Extensions/form_labels/composer.json
+++ b/typo3/sysext/form/Tests/Functional/Service/Fixtures/Extensions/form_labels/composer.json
@@ -4,7 +4,7 @@
 	"description": "",
 	"license": ["GPL-2.0-or-later"],
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/form/composer.json b/typo3/sysext/form/composer.json
index d02b4fbaca56e91e042a2dfe3467a09db4225fcc..ffd0d0a86d90b41caccba37d500ae4a5c54be0a9 100644
--- a/typo3/sysext/form/composer.json
+++ b/typo3/sysext/form/composer.json
@@ -21,8 +21,8 @@
 	"require": {
 		"psr/http-message": "^1.1 || ^2.0",
 		"symfony/expression-language": "^6.4 || ^7.0",
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-frontend": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-filelist": "Listing of files in the directory",
diff --git a/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_fluid_template/composer.json b/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_fluid_template/composer.json
index 74bd83395b9b604891a9ca7ac0380668b45c355f..7180b408e5f8931dae123845094dd295e0c65b33 100644
--- a/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_fluid_template/composer.json
+++ b/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_fluid_template/composer.json
@@ -4,7 +4,7 @@
 	"description": "FluidTemplateContentObject Test",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_request_mirror/composer.json b/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_request_mirror/composer.json
index 94b694d3c73e38f1a920dc5469161f4b6093bf06..7d8890e782b0354a14f169415461673ffd4b8ca2 100644
--- a/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_request_mirror/composer.json
+++ b/typo3/sysext/frontend/Tests/Functional/Fixtures/Extensions/test_request_mirror/composer.json
@@ -4,7 +4,7 @@
 	"description": "a fixture extension for fluid functional tests",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/typo3/sysext/frontend/composer.json b/typo3/sysext/frontend/composer.json
index 35eebc13f15e28c4a9acd7522d24609c6db30417..26031a8cb864b905bb83c4f22822bc6c4a3b0793 100644
--- a/typo3/sysext/frontend/composer.json
+++ b/typo3/sysext/frontend/composer.json
@@ -20,7 +20,7 @@
 	},
 	"require": {
 		"ext-libxml": "*",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/composer.json b/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/composer.json
index 44482001b51927498daa42e02e06871b6a5c1cd2..48d274c8e223dad8cfeb78c3f8f2aa59108e61ee 100644
--- a/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/composer.json
+++ b/typo3/sysext/impexp/Tests/Functional/Fixtures/Extensions/template_extension/composer.json
@@ -4,7 +4,7 @@
 	"description": "a fixture extension for impexp functional tests",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/impexp/composer.json b/typo3/sysext/impexp/composer.json
index b771b3cd3d226f554e4f6a1a29a54ec06ccd7f56..069cb94b2d807905da62b31959ebcef1cb81ec23 100644
--- a/typo3/sysext/impexp/composer.json
+++ b/typo3/sysext/impexp/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/indexed_search/composer.json b/typo3/sysext/indexed_search/composer.json
index d01df4fb70caa6304b80aa4351b3109fb581c6b1..602bafc927249b96f5aca33821dc99674edf6967 100644
--- a/typo3/sysext/indexed_search/composer.json
+++ b/typo3/sysext/indexed_search/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/info/composer.json b/typo3/sysext/info/composer.json
index ba2160f7b7e6e64865fdfd7b890ec11c37691d65..daaf49973ef561057063412be940d7662c13b960 100644
--- a/typo3/sysext/info/composer.json
+++ b/typo3/sysext/info/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/install/composer.json b/typo3/sysext/install/composer.json
index 0f1f431b4844c7c4cd878d6bc41c8dd073bae25f..7f3cabd065685d139024a48a9ffba05c3080a754 100644
--- a/typo3/sysext/install/composer.json
+++ b/typo3/sysext/install/composer.json
@@ -24,9 +24,9 @@
 		"nikic/php-parser": "^4.15.4",
 		"symfony/finder": "^6.4 || ^7.0",
 		"symfony/http-foundation": "^6.4 || ^7.0",
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-extbase": "12.4.*@dev",
-		"typo3/cms-fluid": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-extbase": "12.4.21",
+		"typo3/cms-fluid": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/linkvalidator/composer.json b/typo3/sysext/linkvalidator/composer.json
index 94e9296a83349c4da1bf9f2262df75476fa7fbe8..7d44f2519735517e6c89347a42a4f9167505d90b 100644
--- a/typo3/sysext/linkvalidator/composer.json
+++ b/typo3/sysext/linkvalidator/composer.json
@@ -19,8 +19,8 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-info": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-info": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Regular checks of links"
diff --git a/typo3/sysext/lowlevel/composer.json b/typo3/sysext/lowlevel/composer.json
index ef8e3bbf8ad3cb81c8e5dfd0f0940e8061e38701..ad4268ab736b8af1c006221372bf3a538a748db9 100644
--- a/typo3/sysext/lowlevel/composer.json
+++ b/typo3/sysext/lowlevel/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/opendocs/composer.json b/typo3/sysext/opendocs/composer.json
index 3a37c8683480f269d41f1e7ff4e0bc440ebb0dd5..c5cfda56555b5e85a55b76e23a748fed4ff9273a 100644
--- a/typo3/sysext/opendocs/composer.json
+++ b/typo3/sysext/opendocs/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/reactions/composer.json b/typo3/sysext/reactions/composer.json
index fb3f711540e20c491e10be9699a27947bd835376..4b785d517728c31d1ce36115c6953c07200d548a 100644
--- a/typo3/sysext/reactions/composer.json
+++ b/typo3/sysext/reactions/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-lowlevel": "To display registered reactions in the configuration module"
diff --git a/typo3/sysext/recycler/composer.json b/typo3/sysext/recycler/composer.json
index 04be77d1f73df6207412c557252e12692154ed4b..3781ed68140a20ad6903d981487318f58b2b75af 100644
--- a/typo3/sysext/recycler/composer.json
+++ b/typo3/sysext/recycler/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Remove deleted records after given time"
diff --git a/typo3/sysext/redirects/Tests/Functional/Fixtures/Extensions/test_bolt/composer.json b/typo3/sysext/redirects/Tests/Functional/Fixtures/Extensions/test_bolt/composer.json
index d1336d393d31a1120f43c16b1ef3fb5ca9d04389..b89fe8636d5e71364ef309afe7021c5cc618dba2 100644
--- a/typo3/sysext/redirects/Tests/Functional/Fixtures/Extensions/test_bolt/composer.json
+++ b/typo3/sysext/redirects/Tests/Functional/Fixtures/Extensions/test_bolt/composer.json
@@ -4,8 +4,8 @@
 	"description": "This extension simulates b13/bolt.",
 	"license": "GPL-2.0-or-later",
 	"require": {
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-frontend": "12.4.21"
 	},
 	"extra": {
 		"typo3/cms": {
diff --git a/typo3/sysext/redirects/composer.json b/typo3/sysext/redirects/composer.json
index 7d2da043c3fbe2c804cda9deb2ed3ee079c21408..8ff06c45725034c3eaf3f5c15f8b5af99aff106f 100644
--- a/typo3/sysext/redirects/composer.json
+++ b/typo3/sysext/redirects/composer.json
@@ -23,8 +23,8 @@
 		"psr/http-message": "^1.1 || ^2.0",
 		"psr/log": "^2.0 || ^3.0",
 		"symfony/console": "^6.4 || ^7.0",
-		"typo3/cms-backend": "12.4.*@dev",
-		"typo3/cms-core": "12.4.*@dev",
+		"typo3/cms-backend": "12.4.21",
+		"typo3/cms-core": "12.4.21",
 		"typo3fluid/fluid": "^2.9.2"
 	},
 	"conflict": {
diff --git a/typo3/sysext/reports/composer.json b/typo3/sysext/reports/composer.json
index b46578f488b202d34515625f39c1b15206688c4a..9e5e3a1283ff2d910c6f7b3038b18dbebfd0c0c6 100644
--- a/typo3/sysext/reports/composer.json
+++ b/typo3/sysext/reports/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-scheduler": "Determine system's status and send it via email"
diff --git a/typo3/sysext/rte_ckeditor/composer.json b/typo3/sysext/rte_ckeditor/composer.json
index 05f93564a21cbd0b5aec5c0f031b8a9aa74ca16f..8a0bb2a4d14fd134a9a0c8b06b809462695df3b0 100644
--- a/typo3/sysext/rte_ckeditor/composer.json
+++ b/typo3/sysext/rte_ckeditor/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/scheduler/composer.json b/typo3/sysext/scheduler/composer.json
index e3b715a7c4209bc72cb8bbf886b9c34364857f62..f4d60e726bfd3d4fb850e1843430eeab3d65b4b7 100644
--- a/typo3/sysext/scheduler/composer.json
+++ b/typo3/sysext/scheduler/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/seo/composer.json b/typo3/sysext/seo/composer.json
index 52e75fa16a9154045ed810f372c9084880684584..515ba9448a1746156f25fb20a207f6ade371cfc0 100644
--- a/typo3/sysext/seo/composer.json
+++ b/typo3/sysext/seo/composer.json
@@ -19,9 +19,9 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev",
-		"typo3/cms-frontend": "12.4.*@dev",
-		"typo3/cms-extbase": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21",
+		"typo3/cms-frontend": "12.4.21",
+		"typo3/cms-extbase": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/setup/composer.json b/typo3/sysext/setup/composer.json
index 4d6ae87c3b57f551caa0176cf3bc0ebb4152c154..2c7a83db4a4eb37338cd111b263f0a1e462af6f9 100644
--- a/typo3/sysext/setup/composer.json
+++ b/typo3/sysext/setup/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/sys_note/composer.json b/typo3/sysext/sys_note/composer.json
index 248f78ffac15519b28f28240a7a2682a9a786411..d5f876c5115b9f4dbca96878e31e774dcb51f028 100644
--- a/typo3/sysext/sys_note/composer.json
+++ b/typo3/sysext/sys_note/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/t3editor/composer.json b/typo3/sysext/t3editor/composer.json
index e08edaf4979e23069c258f132184677f23df8b8f..c0f48f75b20be9bfde19ad62b0a99fcb6d17de33 100644
--- a/typo3/sysext/t3editor/composer.json
+++ b/typo3/sysext/t3editor/composer.json
@@ -20,7 +20,7 @@
 	},
 	"require": {
 		"ext-libxml": "*",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/tstemplate/composer.json b/typo3/sysext/tstemplate/composer.json
index f97c0818c746148b3012919aad5cf976f9610cee..0ab2edd90a65d36daf6b5fd26f170a556f9f43a2 100644
--- a/typo3/sysext/tstemplate/composer.json
+++ b/typo3/sysext/tstemplate/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/viewpage/composer.json b/typo3/sysext/viewpage/composer.json
index 53298d56c743fc1dcfe0da4ae4788607c4225a87..296a85ce9e4b297211b1ff9a8672b9fa5f25acb4 100644
--- a/typo3/sysext/viewpage/composer.json
+++ b/typo3/sysext/viewpage/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"
diff --git a/typo3/sysext/webhooks/composer.json b/typo3/sysext/webhooks/composer.json
index 2b295bc890df96c459296ab9a330da9dada7d09f..7d57ac1eb1f36f159ba558d849e62189eb1eedfa 100644
--- a/typo3/sysext/webhooks/composer.json
+++ b/typo3/sysext/webhooks/composer.json
@@ -20,7 +20,7 @@
 	},
 	"require": {
 		"symfony/uid": "^6.4 || ^7.0",
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"suggest": {
 		"typo3/cms-lowlevel": "To display registered webhooks in the configuration module"
diff --git a/typo3/sysext/workspaces/composer.json b/typo3/sysext/workspaces/composer.json
index 4f9b31be35d2cbe5e3008e00b8e620e63aa81a31..f6c582e6b4447d5cd4b7ad430d557fcf6afaac8d 100644
--- a/typo3/sysext/workspaces/composer.json
+++ b/typo3/sysext/workspaces/composer.json
@@ -19,7 +19,7 @@
 		"sort-packages": true
 	},
 	"require": {
-		"typo3/cms-core": "12.4.*@dev"
+		"typo3/cms-core": "12.4.21"
 	},
 	"conflict": {
 		"typo3/cms": "*"