CVE-2023-26477: XWiki

Critical severity, CVSS 9.8. EPSS: 74.8% chance of exploitation in the next 30 days.

XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the `newThemeName` request parameter (URL parameter), in combination with additional parameters. This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6. As a workaround, it is possible to edit `FlamingoThemesCode.WebHomeSheet` and manually perform the changes from the patch fixing the issue.

Affected products

• XWiki XWiki: from 6.2.4, before 13.10.10 (fixed in 13.10.10); from 14.0, before 14.4.6 (fixed in 14.4.6); from 14.5, before 14.9 (fixed in 14.9)

Published 2023-03-02. Last modified 2026-06-17.