- Component Type: TYPO3 CMS
- Subcomponent: Bookmark Toolbar (ext:backend)
- Release Date: September 9, 2025
- Vulnerability Type: Denial of Service
- Affected Versions: 11.0.0-11.5.47, 12.0.0-12.4.36, 13.0.0-13.4.17
- Severity: Medium
- Suggested CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- References: CVE-2025-59014, CWE-248
Problem Description
Due to insufficient input validation, manipulated data saved in the bookmark toolbar of the backend user interface causes a general error state, blocking further access to the interface. Exploiting this vulnerability requires an administrator-level backend user account.
Solution
Update to TYPO3 versions 11.5.48 ELTS, 12.4.37 LTS, 13.4.18 LTS that fix the problem described.
Credits
Thanks to Jakub Świes for reporting this issue, and to TYPO3 core & security team member Oliver Hader 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
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