CVE-2024-25121: Improper Access Control Persisting File Abstraction Layer Entities via Data Handler in TYPO3

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-13 · updated 2026-06-17
Weakness: CWE-200

Description

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions of TYPO3 entities of the File Abstraction Layer (FAL) could be persisted directly via `DataHandler`. This allowed attackers to reference files in the fallback storage directly and retrieve their file names and contents. The fallback storage ("zero-storage") is used as a backward compatibility layer for files located outside properly configured file storages and within the public web root directory. Exploiting this vulnerability requires a valid backend user account. Users are advised to update to TYPO3 version 8.7.57 ELTS, 9.5.46 ELTS, 10.4.43 ELTS, 11.5.35 LTS, 12.4.11 LTS, or 13.0.1 which fix the problem described. When persisting entities of the File Abstraction Layer directly via DataHandler, `sys_file` entities are now denied by default, and `sys_file_reference` & `sys_file_metadata` entities are not permitted to reference files in the fallback storage anymore. When importing data from secure origins, this must be explicitly enabled in the corresponding DataHandler instance by using `$dataHandler->isImporting = true;`.

Affected products

typo3: from 8.0.0 before 8.7.57; from 9.0.0 before 9.5.46; from 10.0.0 before 10.4.43; from 11.0.0 before 11.5.35; from 12.0.0 before 12.4.11; 13.0.0 — fixed in 10.4.43, 11.5.35, 12.4.11, 8.7.57, 9.5.46

How to fix

Upgrade to a fixed version: typo3 10.4.43, 11.5.35, 12.4.11, 8.7.57. Check the vendor advisory for mitigations.

References

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