- Component Type: TYPO3 CMS
- Subcomponent: Log Module (ext:belog)
- Release Date: January 14, 2025
- Vulnerability Type: Cross-Site Request Forgery
- Affected Versions: 11.0.0-11.5.41, 12.0.0-12.4.24, 13.0.0-13.4.2
- Severity: Medium
- Suggested CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- References: CVE-2024-55893, CWE-352, CWE-749
Problem Description
A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method.
Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions:
- the user opens a malicious link, such as one sent via email.
- the user visits a compromised or manipulated website while the following settings are misconfigured:
- security.backend.enforceReferrer feature is disabled,
- BE/cookieSameSite configuration is set to lax or none
The vulnerability in the affected downstream component “Log Module” allows attackers to remove log entries.
Solution
Update to TYPO3 versions 11.5.42 ELTS, 12.4.25 LTS, 13.4.3 LTS that fix the problem described.
In general, it is recommended to keep the security.backend.enforceReferrer feature enabled and set BE/cookieSameSite to strict – which are the default settings.
Extension authors are advised to review and update their codebase accordingly. For further guidance, consult the official documentation on Security Considerations for Backend Modules.
Credits
Thanks to Gabriel Dimitrov who reported this issue and to TYPO3 core and security members Benjamin Franzke, Oliver Hader, Andreas Kienast, Torben Hansen, Elias Häußler who fixed the issue.
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.