GHSA-X4RJ-F7M6-42C3

It has been discovered that TYPO3’s Salted Password system extension (which is a mandatory system component) is vulnerable to Authentication Bypass when using hashing methods which are related by PHP class inheritance. In standard TYPO3 core distributions stored passwords using the blowfish hashing algorithm can be overridden when using MD5 as the default hashing algorithm by just knowing a valid username. Per default the Portable PHP hashing algorithm (PHPass) is used which is not vulnerable.

The application does not adequately verify the identity of a user, device, or process before granting access. Typical impact: unauthorized access to functions or data reserved for authenticated parties.

GHSA-X4RJ-F7M6-42C3 has a CVSS score of 7.5 (High). 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 (8.7.17, 9.3.2, 7.6.30); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is GHSA-X4RJ-F7M6-42C3? GHSA-X4RJ-F7M6-42C3 is a high-severity improper authentication vulnerability in typo3/cms-core (composer), affecting versions >= 8.0.0, < 8.7.17. It is fixed in 8.7.17, 9.3.2, 7.6.30. The application does not adequately verify the identity of a user, device, or process before granting access.
2. How severe is GHSA-X4RJ-F7M6-42C3? GHSA-X4RJ-F7M6-42C3 has a CVSS score of 7.5 (High). 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 GHSA-X4RJ-F7M6-42C3? typo3/cms-core (composer) versions >= 8.0.0, < 8.7.17 is affected.
4. Is there a fix for GHSA-X4RJ-F7M6-42C3? Yes. GHSA-X4RJ-F7M6-42C3 is fixed in 8.7.17, 9.3.2, 7.6.30. Upgrade to this version or later.
5. Is GHSA-X4RJ-F7M6-42C3 exploitable, and should I be worried? Whether GHSA-X4RJ-F7M6-42C3 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 GHSA-X4RJ-F7M6-42C3 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 GHSA-X4RJ-F7M6-42C3?
   • Upgrade typo3/cms-core to 8.7.17 or later
   • Upgrade typo3/cms-core to 9.3.2 or later
   • Upgrade typo3/cms-core to 7.6.30 or later

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