CVE-2023-26471

XWiki Platform users may execute anything with superadmin right through comments and async macro

Workarounds

The only known workaround consists in applying the following patch and rebuilding and redeploying org.xwiki.platform:xwiki-platform-rendering-async-macro.

References

• https://jira.xwiki.org/browse/XWIKI-20234

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira
• Email us at Security ML

Comments are supposed to be executed with the right of superadmin but in restricted mode (anything dangerous is disabled) but the async macro is not taking into account the restricted mode.

This means that any user with comment right can use the async macro to make it execute any wiki content with the right of superadmin as in:

{{async}}
{{groovy}}println "it works !"{{/groovy}}
{{/async}}

CVE-2023-26471 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 (13.10.10, 14.4.6, 14.9); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

This has been patched in XWiki 14.9, 14.4.6, and 13.10.10.

1. What is CVE-2023-26471? CVE-2023-26471 is a critical-severity security vulnerability in org.xwiki.platform:xwiki-platform-rendering-async-macro (maven), affecting versions >= 11.6-rc-1, < 13.10.10. It is fixed in 13.10.10, 14.4.6, 14.9.
2. How severe is CVE-2023-26471? CVE-2023-26471 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-rendering-async-macro are affected by CVE-2023-26471? org.xwiki.platform:xwiki-platform-rendering-async-macro (maven) versions >= 11.6-rc-1, < 13.10.10 is affected.
4. Is there a fix for CVE-2023-26471? Yes. CVE-2023-26471 is fixed in 13.10.10, 14.4.6, 14.9. Upgrade to this version or later.
5. Is CVE-2023-26471 exploitable, and should I be worried? Whether CVE-2023-26471 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-2023-26471 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-2023-26471?
   • Upgrade org.xwiki.platform:xwiki-platform-rendering-async-macro to 13.10.10 or later
   • Upgrade org.xwiki.platform:xwiki-platform-rendering-async-macro to 14.4.6 or later
   • Upgrade org.xwiki.platform:xwiki-platform-rendering-async-macro to 14.9 or later

Other vulnerabilities in org.xwiki.platform:xwiki-platform-rendering-async-macro