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High

The TYPO3 CMS Backend has Broken Authentication in Backend MFA

  • Disclosed: 20.05.2025
  • Updated: 11.10.2026 10:22

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.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package typo3/cms-backend >= 12.0.0, < 12.4.31, >= 13.0.0, < 13.4.12 12.4.31, 13.4.12

References

CVSS score 7.2/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-288
Platform
Composer
Package
typo3/cms-backend
Disclosed
20.05.2025
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-744g-7qm9-hjh9 - CC BY 4.0

Vulnerability history: typo3/cms-backend

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (25) in the archive
Total entries
25
First → latest
03.2021 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 6
  • Medium 16
  • Low 3

Disclosures per year

Severity:
  1. TYPO3 CMS - Broken Access Control in Backend and Install Tool
    High CVE-2026-19418 >= 13.0.0, < 13.4.34 13.4.34
  2. TYPO3 CMS Stores Cleartext Password in User Settings Module
    High · 7.5 CVE-2026-6553 >= 14.2.0, < 14.3.0 14.3.0
  3. The TYPO3 CMS Backend has Broken Authentication in Backend MFA this entry
    High · 7.2 CVE-2025-47941 >= 12.0.0, < 12.4.31, >= 13.0.0, < 13.4.12 12.4.31, 13.4.12
  4. TYPO3 Backend Command Injection via Shell Metacharacters in Uploaded File Name
    High CVE-2009-3631 <= 4.0.13, >= 4.1.0, < 4.1.13, >= 4.2.0, < 4.2.10, >= 4.3alpha1, < 4.3beta2 4.1.13, 4.2.10, 4.3beta2
  5. TYPO3 SQL injection vulnerability on the backend
    High · 8.8 CVE-2010-3662 < 4.1.14, >= 4.2.0, < 4.2.13, >= 4.3.0, < 4.3.4, >= 4.4.0, < 4.4.1 4.1.14, 4.2.13, 4.3.4, 4.4.1
  6. TYPO3 Arbitrary Code Execution vulnerability on the backend
    High · 8.8 CVE-2010-3663 < 4.1.14, >= 4.2, < 4.2.13, >= 4.3, < 4.3.4, >= 4.4, < 4.4.1 4.1.14, 4.2.13, 4.3.4, 4.4.1

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