CVE-2021-29459: XWiki

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. It is possible to persistently inject scripts in XWiki versions prior to 12.6.3 and 12.8. Unregistred users can fill simple text fields. Registered users can fill in their personal information and (if they have edit rights) fill the values of static lists using App Within Minutes. There is no easy workaround except upgrading XWiki. The vulnerability has been patched on XWiki 12.8 and 12.6.3.

Affected products

• XWiki XWiki: before 12.6.3 (fixed in 12.6.3); from 12.6.4, before 12.8 (fixed in 12.8)

Published 2021-04-20. Last modified 2026-06-17.