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Vulnerability · Published May 20, 2026 · Assigned by GitHub_M

CVE-2026-23734XWiki Platform: Path traversal via resources parameter in ssx and jsx endpoints when using leading slash

Critical 9.3

In plain English

A critical-severity security flaw in xwiki-commons from xwiki. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 18.5% (higher than 97% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)18.5%top 2.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.xwiki.commons:xwiki-commons-classloader-api16.10.17GHSA-xq3r-2qv5-vqqm
Mavenorg.xwiki.commons:xwiki-commons-classloader-api17.4.9GHSA-xq3r-2qv5-vqqm
Mavenorg.xwiki.commons:xwiki-commons-classloader-api17.10.3GHSA-xq3r-2qv5-vqqm
Mavenorg.xwiki.commons:xwiki-commons-classloader-api18.1.0-rc-1GHSA-xq3r-2qv5-vqqm

Affected products (as reported)

VendorProductVersions
xwiki xwiki-commons >= 4.2-milestone-2, < 16.10.17>= 17.0.0-rc-1, < 17.4.9>= 17.5.0, < 17.10.3>= 18.0.0-rc-1, < 18.1.0-rc-1

Weakness: CWE-23 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References