- Component Type: TYPO3 CMS
- Subcomponent: Session Handling (ext:backend)
- Release Date: May 20, 2025
- Vulnerability Type: Broken Authentication
- Affected Versions: 12.0.0-12.4.30, 13.0.0-13.4.11
- Severity: High
- Suggested CVSS: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- References: CVE-2025-47941, CWE-288
Problem Description
The multifactor authentication (MFA) dialog presented during backend login can be bypassed due to insufficient enforcement of access restrictions on all backend routes.
Successful exploitation requires valid backend user credentials, as MFA can only be bypassed after successful authentication.
Solution
Update to TYPO3 versions 12.4.31 LTS, 13.4.12 LTS that fix the problem described.
Credits
Thanks to Jens Jacobsen and Y. Kahveci for reporting this issue, and to TYPO3 security team member Torben Hansen for fixing it.
General Advice
Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.
General Note
All security-related code changes are tagged so you can easily look them up in our review system.