CVE-2026-34151
CVE-2026-34151 · XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+
This page contains facts from public vulnerability sources. Check the original advisory before updating.
XWiki Platform is a generic wiki platform. Prior to 17.10.5 and 18.2.0, the /skin/ action in com.xpn.xwiki.web.SkinAction can resolve double-encoded parent-directory segments outside the intended skin or web-application resource prefix when Jetty 12 or later decodes the request path. The affected lookup is replaced with Environment.getResourceAsStream(String, String), which constrains a resource to its expected prefix. An unauthenticated remote attacker can use the vulnerable behavior to read arbitrary resources permitted to the Jetty process, including WEB-INF/xwiki.cfg and, depending on deployment depth and operating-system permissions, host files. Tomcat and Jetty versions before 12 do not appear affected. This issue is fixed in versions 17.10.5 and 18.2.0.
CVSS 8.2 · High · EPSS 2.5% · Public exploit
- Published
- Updated
Affected products and versions
xwiki-platform
- Versions
- < 17.10.5: Affected
- >= 18.0.0-rc-1, < 18.2.0: Affected
No fix published
Original sources
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6
- https://github.com/xwiki/xwiki-commons/pull/1675
- https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383
- https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0
- https://jira.xwiki.org/browse/XCOMMONS-3594
- https://jira.xwiki.org/browse/XWIKI-24075
- https://nvd.nist.gov/vuln/detail/CVE-2026-34151