CVE-2026-34151
XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Deferred | 4.0 | High8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 2.5% · top 15% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.
Weakness
Affected products
- affected < 17.10.5
- affected >= 18.0.0-rc-1, < 18.2.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.xwiki.platform:xwiki-platform-oldcoreGHSA-qj4x-9g63-25g6 (opens in a new tab)
References (8)
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/xwiki/xwiki-commons/pull/1675 (opens in a new tab)x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383 (opens in a new tab)x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85 (opens in a new tab)x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5 (opens in a new tab)x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0 (opens in a new tab)x_refsource_MISC
- https://jira.xwiki.org/browse/XCOMMONS-3594 (opens in a new tab)x_refsource_MISC
- https://jira.xwiki.org/browse/XWIKI-24075 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-qj4x-9g63-25g6 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-34151)Record last updated .