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CVE-2026-34151— XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+

Quick assessment

Affected
xwiki xwiki-platform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XWiki Platform是XWiki基金会开源的一套用于创建Web协作应用程序的Wiki平台。 XWiki Platform存在路径遍历漏洞，该漏洞源于 /bin/skin/ 资源访问接口中，当 XWiki 部署在 Jetty 12 及以上版本环境时，接口对双重编码的路径穿越序列处理不当导致未经身份认证的远程攻击者可以构造恶意请求，读取服务器敏感文件，从而造成敏感信息泄露。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 2

VendorProduct Version RangeStatus
xwiki xwiki-platform < 17.10.5 affected
>= 18.0.0-rc-1, < 18.2.0 affected
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I. Basic Information for CVE-2026-34151

Vulnerability Information
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Vulnerability Title
XWiki Platform: Resource path traversal via /skin/ action endpoint in Jetty 12+
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
路径遍历：’../filedir’
Source: CVE Program / CVE List V5
Vulnerability Title
XWiki Platform 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XWiki Platform是XWiki基金会开源的一套用于创建Web协作应用程序的Wiki平台。 XWiki Platform存在路径遍历漏洞，该漏洞源于 /bin/skin/ 资源访问接口中，当 XWiki 部署在 Jetty 12 及以上版本环境时，接口对双重编码的路径穿越序列处理不当导致未经身份认证的远程攻击者可以构造恶意请求，读取服务器敏感文件，从而造成敏感信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
xwiki xwiki-platform < 17.10.5 -

II. Public POCs for CVE-2026-34151

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III. Intelligence Information for CVE-2026-34151

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Patches & Fixes for CVE-2026-34151 (1)

Vendor Advisories for CVE-2026-34151 (1)

Vendor Pages for CVE-2026-34151 (3)

Other References for CVE-2026-34151 (1)

IV. Related Vulnerabilities

Same product: xwiki-platform
Same vendor: xwiki
Same weakness: CWE-24

V. Comments for CVE-2026-34151

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