CVE-2024-25121

Summary

CVE-2024-25121 is a vulnerability affecting TYPO3, an open-source PHP web content management system. In exploitable versions, entities of the File Abstraction Layer (FAL) can be directly persisted using `DataHandler`, granting attackers access to reference files in the fallback storage and retrieve their names and contents. The fallback storage, used as a compatibility layer for files outside properly configured storages within the public web root, is the target of this issue. To exploit the vulnerability, an authenticated backend user account is required. Users are advised to update to the following TYPO3 versions: 8.7.57 ELTS, 9.5.46 ELTS, 10.4.43 ELTS, 11.5.35 LTS, 12.4.11 LTS, or 13.0.1 to resolve the issue. New configurations now prevent `sys_file` entities from being persisted directly via `DataHandler`, while `sys_file_reference` and `sys_file_metadata` entities can no longer reference files in the fallback storage. For secure data imports, explicit enabling of this functionality is mandatory in the DataHandler instance using `$dataHandler->isImporting = true;`.

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