Summary
TYPO3 Bookmark Toolbar vulnerable to denial of service
An uncaught exception in the Bookmark Toolbar of TYPO3 CMS versions 11.0.0–11.5.47, 12.0.0–12.4.36, and 13.0.0–13.4.17 lets administrator‑level backend users trigger a denial‑of‑service condition in the backend user interface by saving manipulated data in the bookmark toolbar.
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Already deployed Kodem?
See it in your environmentNew to Kodem? Get a demo →Remediation advice
typo3/cms-backend to 12.4.37 or later; typo3/cms-backend to 12.4.37 or later; typo3/cms-backend to 13.4.18 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2025-59014? CVE-2025-59014 is a medium-severity security vulnerability in typo3/cms-backend (composer), affecting versions >= 11.0.0, < 11.5.48. It is fixed in 12.4.37, 13.4.18.
- Which versions of typo3/cms-backend are affected by CVE-2025-59014? typo3/cms-backend (composer) versions >= 11.0.0, < 11.5.48 is affected.
- Is there a fix for CVE-2025-59014? Yes. CVE-2025-59014 is fixed in 12.4.37, 13.4.18. Upgrade to this version or later.
- Is CVE-2025-59014 exploitable, and should I be worried? Whether CVE-2025-59014 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2025-59014 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2025-59014?
- Upgrade
typo3/cms-backendto 12.4.37 or later - Upgrade
typo3/cms-backendto 12.4.37 or later - Upgrade
typo3/cms-backendto 13.4.18 or later
- Upgrade