CVE-2023-29522

XWiki Platform vulnerable to code injection from view right on XWiki.ClassSheet

Workarounds

The fix is only impacting Velocity templates and page contents, so applying this patch is enough to fix the issue.

References

• https://github.com/xwiki/xwiki-platform/commit/d7e56185376641ee5d66477c6b2791ca8e85cfee
• https://jira.xwiki.org/browse/XWIKI-20456

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

Any user with view rights can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. The attack works by opening a non-existing page with a name crafted to contain a dangerous payload.

For instance: Open <xwiki-host>/xwiki/bin/view/%22%2F%7D%7D%7B%7B%2Fhtml%7D%7D%20%7B%7Basync%20async%3D%22true%22%20cached%3D%22false%22%20context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln(%22Hello%20%22%20%2B%20%22from%20groovy!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D?sheet=XWiki.ClassSheet&xpage=view, where <xwiki-host> is the URL of your XWiki installation.

CVE-2023-29522 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 (14.4.8, 14.10.3); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

This has been patched in XWiki 14.4.8, 14.10.3 and 15.0RC1.

1. What is CVE-2023-29522? CVE-2023-29522 is a high-severity security vulnerability in org.xwiki.platform:xwiki-platform-xclass-ui (maven), affecting versions >= 7.0-rc-1, < 14.4.8. It is fixed in 14.4.8, 14.10.3.
2. How severe is CVE-2023-29522? CVE-2023-29522 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 org.xwiki.platform:xwiki-platform-xclass-ui are affected by CVE-2023-29522? org.xwiki.platform:xwiki-platform-xclass-ui (maven) versions >= 7.0-rc-1, < 14.4.8 is affected.
4. Is there a fix for CVE-2023-29522? Yes. CVE-2023-29522 is fixed in 14.4.8, 14.10.3. Upgrade to this version or later.
5. Is CVE-2023-29522 exploitable, and should I be worried? Whether CVE-2023-29522 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-2023-29522 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-2023-29522?
   • Upgrade org.xwiki.platform:xwiki-platform-xclass-ui to 14.4.8 or later
   • Upgrade org.xwiki.platform:xwiki-platform-xclass-ui to 14.10.3 or later