Vulnerability Description
XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 5.4.5 and prior to version 14.10, the XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). This has been fixed in version 14.10 by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. There are no known workarounds apart from upgrading.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xwiki | Xwiki | >= 5.4.5, < 14.10 |
Related Weaknesses (CWE)
References
- https://github.com/xwiki/xwiki-rendering/commit/a4ca31f99f524b9456c64150d6f37598Patch
- https://github.com/xwiki/xwiki-rendering/security/advisories/GHSA-w3wh-g4m9-783pPatchThird Party Advisory
- https://jira.xwiki.org/browse/XRENDERING-660Issue Tracking
- https://github.com/xwiki/xwiki-rendering/security/advisories/GHSA-w3wh-g4m9-783pPatchThird Party Advisory
FAQ
What is CVE-2025-53835?
CVE-2025-53835 is a vulnerability with a CVSS score of 9.0 (CRITICAL). XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 5.4.5 and prior to version 14...
How severe is CVE-2025-53835?
CVE-2025-53835 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-53835?
Check the references section above for vendor advisories and patch information. Affected products include: Xwiki Xwiki.