CVE-2024-55892

Problem

Applications that use TYPO3\CMS\Core\Http\Uri to parse externally provided URLs (e.g., via a query parameter) and validate the host of the parsed URL may be vulnerable to open redirect or SSRF attacks if the URL is used after passing the validation checks.

Credits

Thanks to Sam Mush and Christian Eßl who reported this issue and to TYPO3 core & security team member Benjamin Franzke who fixed the issue.

References

• TYPO3-CORE-SA-2025-002

Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites. Typical impact: phishing and credential harvesting via a trusted domain.

CVE-2024-55892 has a CVSS score of 4.8 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (9.5.49, 10.4.48, 11.5.42, 12.4.25, 13.4.3); upgrading removes the vulnerable code path.

Kodem intelligence

Update to TYPO3 versions 9.5.49 ELTS, 10.4.48 ELTS, 11.5.42 ELTS, 12.4.25 LTS, 13.4.3 LTS that fix the problem described.

1. What is CVE-2024-55892? CVE-2024-55892 is a medium-severity open redirect vulnerability in typo3/cms-core (composer), affecting versions >= 9.0.0, <= 9.5.48. It is fixed in 9.5.49, 10.4.48, 11.5.42, 12.4.25, 13.4.3. Untrusted input controls a URL used for redirection, which can forward users to attacker-controlled sites.
2. How severe is CVE-2024-55892? CVE-2024-55892 has a CVSS score of 4.8 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of typo3/cms-core are affected by CVE-2024-55892? typo3/cms-core (composer) versions >= 9.0.0, <= 9.5.48 is affected.
4. Is there a fix for CVE-2024-55892? Yes. CVE-2024-55892 is fixed in 9.5.49, 10.4.48, 11.5.42, 12.4.25, 13.4.3. Upgrade to this version or later.
5. Is CVE-2024-55892 exploitable, and should I be worried? Whether CVE-2024-55892 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
6. What actually determines whether CVE-2024-55892 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.
7. How do I fix CVE-2024-55892?
   • Upgrade typo3/cms-core to 9.5.49 or later
   • Upgrade typo3/cms-core to 10.4.48 or later
   • Upgrade typo3/cms-core to 11.5.42 or later
   • Upgrade typo3/cms-core to 12.4.25 or later
   • Upgrade typo3/cms-core to 13.4.3 or later