GHSA-X428-565F-8XJ2

Backend API configuration using Page TSconfig is vulnerable to arbitrary code execution and cross-site scripting. TSconfig fields of page properties in backend forms can be used to inject malicious sequences. Field tsconfig_includes is vulnerable to directory traversal leading to same scenarios as having direct access to TSconfig settings.

A valid backend user account having access to modify values for fields pages.TSconfig and pages.tsconfig_includes is needed in order to exploit this vulnerability.

Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files. Typical impact: unauthorized file read or write outside the intended directory.

GHSA-X428-565F-8XJ2 has a CVSS score of 8.8 (High). The vector is network-reachable, low 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 (8.7.27, 9.5.8); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is GHSA-X428-565F-8XJ2? GHSA-X428-565F-8XJ2 is a high-severity path traversal vulnerability in typo3/cms-core (composer), affecting versions >= 8.0.0, < 8.7.27. It is fixed in 8.7.27, 9.5.8. Input manipulates file paths to reach files outside the intended directory, such as configuration or credential files.
2. How severe is GHSA-X428-565F-8XJ2? GHSA-X428-565F-8XJ2 has a CVSS score of 8.8 (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-X428-565F-8XJ2? typo3/cms-core (composer) versions >= 8.0.0, < 8.7.27 is affected.
4. Is there a fix for GHSA-X428-565F-8XJ2? Yes. GHSA-X428-565F-8XJ2 is fixed in 8.7.27, 9.5.8. Upgrade to this version or later.
5. Is GHSA-X428-565F-8XJ2 exploitable, and should I be worried? Whether GHSA-X428-565F-8XJ2 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-X428-565F-8XJ2 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-X428-565F-8XJ2?
   • Upgrade typo3/cms-core to 8.7.27 or later
   • Upgrade typo3/cms-core to 9.5.8 or later

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