CVE-2024-55662

XWiki allows remote code execution through the extension sheet

Workarounds

Since Extension Repository Application is not mandatory, it can be safely disabled on instances that do not use it.
It is also possible to manually apply this patch to the page ExtensionCode.ExtensionSheet, as well as this patch to the page ExtensionCode.ExtensionAuthorsDisplayer.

References

• https://jira.xwiki.org/browse/XWIKI-21890
• https://github.com/xwiki/xwiki-platform/commit/8659f17d500522bf33595e402391592a35a162e8

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira XWiki.org
• Email us at Security Mailing List

On instances where Extension Repository Application is installed, any user can execute any code requiring programming rights on the server.
In order to reproduce on an instance, as a normal user without script nor programming rights, go to your profile and add an object of type ExtensionCode.ExtensionClass. Set the description to {{async}}{{groovy}}println("Hello from Description"){{/groovy}}{{/async}} and press Save and View. If the description displays as Hello from Description without any error, then the instance is vulnerable.

Untrusted input is evaluated as executable code within the application's runtime environment. Typical impact: arbitrary code execution within the application's privilege context.

CVE-2024-55662 has a CVSS score of 9.9 (Critical). 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 (15.10.9, 16.3.0); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

This vulnerability has been fixed in XWiki 15.10.9 and 16.3.0.

1. What is CVE-2024-55662? CVE-2024-55662 is a critical-severity code injection vulnerability in org.xwiki.platform:xwiki-platform-repository-server-ui (maven), affecting versions >= 3.3-milestone-1, < 15.10.9. It is fixed in 15.10.9, 16.3.0. Untrusted input is evaluated as executable code within the application's runtime environment.
2. How severe is CVE-2024-55662? CVE-2024-55662 has a CVSS score of 9.9 (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 org.xwiki.platform:xwiki-platform-repository-server-ui are affected by CVE-2024-55662? org.xwiki.platform:xwiki-platform-repository-server-ui (maven) versions >= 3.3-milestone-1, < 15.10.9 is affected.
4. Is there a fix for CVE-2024-55662? Yes. CVE-2024-55662 is fixed in 15.10.9, 16.3.0. Upgrade to this version or later.
5. Is CVE-2024-55662 exploitable, and should I be worried? Whether CVE-2024-55662 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-2024-55662 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-2024-55662?
   • Upgrade org.xwiki.platform:xwiki-platform-repository-server-ui to 15.10.9 or later
   • Upgrade org.xwiki.platform:xwiki-platform-repository-server-ui to 16.3.0 or later