HighGHSA-744g-7qm9-hjh9CVE-2025-47941

The TYPO3 CMS Backend has Broken Authentication in Backend MFA

Published 20 May 2025 · Updated 20 May 2025

Affected packages

typo3/cms-backendComposer
Affected
>=12.0.0 <12.4.31
Fixed in
12.4.31
Update to the fixed version for your release line, for example:composer require typo3/cms-backend:^12.4.31
typo3/cms-backendComposer
Affected
>=13.0.0 <13.4.12
Fixed in
13.4.12
Update to the fixed version for your release line, for example:composer require typo3/cms-backend:^13.4.12

Details

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.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.