GHSA-3w32-23wj-rxg3 Craft CMS Vulnerable to Unauthorized Deletion of Destination Folders During Forced Moves

• Packagist craftcms/cms: >= 5.0.0-RC1, < 5.9.21 → fixed in 5.9.21 • Packagist craftcms/cms: >= 4.0.0-RC1, < 4.17.14 → fixed in 4.17.14

We have identified an authorization issue in Craft CMS where a forced folder move can delete a conflicting destination folder without destination delete permission. Description Craft CMS’s `craft\\controllers\\AssetsController::actionMoveFolder()` supports moving an asset folder into a destination parent folder. If a folder with the same name already exists at the destination, the action can be called with `force=true` to overwrite the destination. The permission checks for this action allow: • `deleteAssets:` for the folder being moved • `createFolders:` for the destination parent folder • `saveAssets:` for the destination parent folder The action does not require `deleteAssets` on the destination volume or destination conflict folder. When `force=true` and a name conflict exists, the code deletes the destination folder to resolve the conflict. ```php $this->requireVolumePermissionByFolder('deleteAssets', $folderToMove); $this->requireVolumePermissionByFolder('createFolders', $destinationFolder); $this->requireVolumePermissionByFolder('saveAssets', $destinationFolder); ``` *src/controllers/AssetsController.php:L751-L753* Indexed destination conflicts are deleted via the Assets service: ```php $assets->deleteFoldersByIds($existingFolder->id); ``` *src/controllers/AssetsController.php:L798-L798* Unindexed destination conflicts are deleted directly in the volume filesystem: ```php $targetVolume->deleteDirectory(rtrim($destinationFolder->path, '/') . '/' . $folderToMove->name); ``` *src/controllers/AssetsController.php:L815* Impact A user who cannot delete assets in a destination volume can still delete a destination folder and its contents by triggering a forced move into a conflicting name. This can cause asset loss, broken references in entries and fields that point to deleted assets, and operational disruption.