[BUGFIX] Avoid exceptions during link checking

If a rich text field contains a link to a file or folder the current
user doesn't have access to, the thrown exception must be handled and
ignored.

Resolves: #91400
Releases: master, 10.4
Change-Id: I255d6793785d1a074870aafc7b0f07bd9e82af94
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66021


Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/core/Classes/Html/RteHtmlParser.php

@@ -21,6 +21,7 @@ use Psr\Log\LoggerAwareTrait;
 use TYPO3\CMS\Core\Html\Event\BrokenLinkAnalysisEvent;
 use TYPO3\CMS\Core\LinkHandling\Exception\UnknownLinkHandlerException;
 use TYPO3\CMS\Core\LinkHandling\LinkService;
+use TYPO3\CMS\Core\Resource\Exception\InsufficientFolderAccessPermissionsException;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
@@ -779,6 +780,8 @@ class RteHtmlParser extends HtmlParser implements LoggerAwareInterface
                 if ($brokenLinkAnalysis->isBrokenLink()) {
                     $attributes['data-rte-error'] = $brokenLinkAnalysis->getReason();
                 }
+            } catch (InsufficientFolderAccessPermissionsException $e) {
+                // do nothing if user doesn't have access to the file/folder
             } catch (UnknownLinkHandlerException $e) {
                 $attributes['data-rte-error'] = $e->getMessage();
             }

typo3/sysext/core/Classes/LinkHandling/FolderLinkHandler.php

@@ -18,6 +18,7 @@ declare(strict_types=1);
 namespace TYPO3\CMS\Core\LinkHandling;
 
 use TYPO3\CMS\Core\Resource\Exception\FolderDoesNotExistException;
+use TYPO3\CMS\Core\Resource\Exception\InsufficientFolderAccessPermissionsException;
 use TYPO3\CMS\Core\Resource\ResourceFactory;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
@@ -67,7 +68,7 @@ class FolderLinkHandler implements LinkHandlingInterface
         $combinedIdentifier = ($data['storage'] ?? '0') . ':' . $data['identifier'];
         try {
             $folder = $this->getResourceFactory()->getFolderObjectFromCombinedIdentifier($combinedIdentifier);
-        } catch (FolderDoesNotExistException $e) {
+        } catch (FolderDoesNotExistException|InsufficientFolderAccessPermissionsException $e) {
             $folder = null;
         }
         return ['folder' => $folder];