CVE-2026-34151
Severity not reportedXWiki Platform is a generic wiki platform.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/xwiki/xwiki-commons/pull/1675 security-advisories@github.com
- https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383 security-advisories@github.com
- https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85 security-advisories@github.com
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5 security-advisories@github.com
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0 security-advisories@github.com
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6 security-advisories@github.com
- https://jira.xwiki.org/browse/XCOMMONS-3594 security-advisories@github.com
- https://jira.xwiki.org/browse/XWIKI-24075 security-advisories@github.com