GHSA-CC97-G92W-JM65

Phar files (formerly known as "PHP archives") can act als self extracting archives which leads to the fact that source code is executed when Phar files are invoked. The Phar file format is not limited to be stored with a dedicated file extension - "bundle.phar" would be valid as well as "bundle.txt" would be. This way, Phar files can be obfuscated as image or text file which would not be denied from being uploaded and persisted to a TYPO3 installation. Due to a missing sanitization of user input, those Phar files can be invoked by manipulated URLs in TYPO3 backend forms. A valid backend user account is needed to exploit this vulnerability. In theory the attack vector would be possible in the TYPO3 frontend as well, however no functional exploit has been identified so far.

GHSA-CC97-G92W-JM65 has a CVSS score of 9.8 (Critical). 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-CC97-G92W-JM65? GHSA-CC97-G92W-JM65 is a critical-severity security 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.
2. How severe is GHSA-CC97-G92W-JM65? GHSA-CC97-G92W-JM65 has a CVSS score of 9.8 (Critical). 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-CC97-G92W-JM65? typo3/cms-core (composer) versions >= 8.0.0, < 8.7.17 is affected.
4. Is there a fix for GHSA-CC97-G92W-JM65? Yes. GHSA-CC97-G92W-JM65 is fixed in 8.7.17, 9.3.2, 7.6.30. Upgrade to this version or later.
5. Is GHSA-CC97-G92W-JM65 exploitable, and should I be worried? Whether GHSA-CC97-G92W-JM65 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-CC97-G92W-JM65 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-CC97-G92W-JM65?
   • 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

Other vulnerabilities in typo3/cms-core