XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-34151
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 18:17:47 UTC
Updated2026-09-14 19:17:19 UTC
DescriptionXWiki 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.

Risk And Classification

Primary CVSS: v4.0 8.2 HIGH from [email protected]

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

Problem Types: CWE-24 | CWE-24 CWE-24: Path Traversal: '../filedir'

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.2HIGHCVSS: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/C...
4.0CNADECLARED8.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Xwiki Xwiki-platform affected < 17.10.5 Not specified
CNA Xwiki Xwiki-platform affected >= 18.0.0-rc-1, < 18.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0 [email protected] github.com
jira.xwiki.org/browse/XWIKI-24075 [email protected] jira.xwiki.org
github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d2... [email protected] github.com
jira.xwiki.org/browse/XCOMMONS-3594 [email protected] jira.xwiki.org
github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5 [email protected] github.com
github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c6... [email protected] github.com
github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6 [email protected] github.com
github.com/xwiki/xwiki-commons/pull/1675 [email protected] github.com
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