High (8.8) in xwiki xwiki. EPSS 66% chance of exploitation in the next 30 days. Fixed in org.xwiki.platform:xwiki-platform-attachment-ui 13.10.11, 14.10.1, 14.4.8.
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with view rights on `XWiki.AttachmentSelector` can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping in the "Cancel and return to page" button. This page is installed by default. This vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. There are no known workarounds for this vulnerability.
Severity
CVSS 3.1
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
66% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)