The TYPO3 CMS Backend has Broken Authentication in Backend MFA

ALTO 7.2CVE-2025-47941 · GHSA-744g-7qm9-hjh9 · Published 20/05/2025 · updated 17/06/2026

Package	Affected versions	Patched versions
typo3/cms-backend Packagist	`≥ 12.0.0, < 12.4.31≥ 13.0.0, < 13.4.12`	`12.4.3113.4.12`
typo3 typo3	`≥ 12.0.0, < 12.4.31≥ 13.0.0, < 13.4.12`	`12.4.3113.4.12`

Description

Problem

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.

NVD description

TYPO3 is an open source, PHP based web content management system. In versions on the 12.x branch prior to 12.4.31 LTS and the 13.x branch prior to 13.4.2 LTS, 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. Users should update to TYPO3 version 12.4.31 LTS or 13.4.12 LTS to fix the problem.

References

TYPO3/typo3 security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2025-47941 · ADVISORY
TYPO3-CMS/backend commit 034f589 · WEB
TYPO3-CMS/backend · PACKAGE
typo3.org/security/advisory/typo3-core-sa-2025-015 · WEB

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Package

Affected versions

Patched versions

typo3/cms-backend

Packagist

≥ 12.0.0, < 12.4.31≥ 13.0.0, < 13.4.12

12.4.3113.4.12

typo3

≥ 12.0.0, < 12.4.31≥ 13.0.0, < 13.4.12

12.4.3113.4.12

Description

Problem

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.

NVD description