CVE-2023-37462

CVE-2023-37462 is a critical-severity security vulnerability in org.xwiki.platform:xwiki-platform-skin-ui (maven), affecting versions >= 7.0-rc-1, < 14.4.8. It is fixed in 14.4.8, 14.10.4.

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Summary

org.xwiki.platform:xwiki-platform-skin-ui Eval Injection vulnerability

Workarounds

The fix can also be applied manually to the impacted document SkinsCode.XWikiSkinsSheet.

References

For more information

If you have any questions or comments about this advisory:

Impact

Improper escaping in the document SkinsCode.XWikiSkinsSheet leads to a possible privilege escalation from view right on that document to programming rights, or in other words, it is possible to 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.

It is possible to check if an existing installation is vulnerable by opening <xwiki-host>/xwiki/bin/view/%22%5D%5D%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=SkinsCode.XWikiSkinsSheet&xpage=view where <xwiki-host is the URL of the XWiki installation. The expected result are two list items with "Edit this skin" and "Test this skin" without any further text. If the installation is vulnerable, the second list item is "Test this skin Hello from groovy!.WebHome"]]". This shows that the Groovy macro has been executed.

CVE-2023-37462 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 (14.4.8, 14.10.4); upgrading removes the vulnerable code path.

Affected versions

org.xwiki.platform:xwiki-platform-skin-ui (>= 7.0-rc-1, < 14.4.8) org.xwiki.platform:xwiki-platform-skin-ui (>= 14.5, < 14.10.4)

Security releases

org.xwiki.platform:xwiki-platform-skin-ui → 14.4.8 (maven) org.xwiki.platform:xwiki-platform-skin-ui → 14.10.4 (maven)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

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. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

This has been patched in XWiki 14.4.8, 14.10.4 and 15.0-rc-1.

Frequently Asked Questions

  1. What is CVE-2023-37462? CVE-2023-37462 is a critical-severity security vulnerability in org.xwiki.platform:xwiki-platform-skin-ui (maven), affecting versions >= 7.0-rc-1, < 14.4.8. It is fixed in 14.4.8, 14.10.4.
  2. How severe is CVE-2023-37462? CVE-2023-37462 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-skin-ui are affected by CVE-2023-37462? org.xwiki.platform:xwiki-platform-skin-ui (maven) versions >= 7.0-rc-1, < 14.4.8 is affected.
  4. Is there a fix for CVE-2023-37462? Yes. CVE-2023-37462 is fixed in 14.4.8, 14.10.4. Upgrade to this version or later.
  5. Is CVE-2023-37462 exploitable, and should I be worried? Whether CVE-2023-37462 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-2023-37462 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-2023-37462?
    • Upgrade org.xwiki.platform:xwiki-platform-skin-ui to 14.4.8 or later
    • Upgrade org.xwiki.platform:xwiki-platform-skin-ui to 14.10.4 or later

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