XWiki Platform has path traversal via resources parameter in ssx and jsx endpoints when using leading slash
Impact
It's possible to get access and read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false.
This can apparently be reproduced on Tomcat instances.
Patches
This has been patched in 18.0.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
Workarounds
There is no known workaround, other than upgrading XWiki.
References
- https://jira.xwiki.org/browse/XCOMMONS-3547
- https://github.com/xwiki/xwiki-commons/commit/a979cafd89f6a9c9c0b9ab19744d672df64429bf
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki.org
- Email us at Security Mailing List
Attribution
The vulnerability was reported by Michał Kołek.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.xwiki.commons:xwiki-commons-classloader-api | >= 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 | 16.10.17, 17.4.9, 17.10.3, 18.1.0-rc-1 |
References
- CVSS 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- Weakness (CWE)
CWE-23- Platform
- Java / Kotlin (Maven)
- Package
org.xwiki.commons:xwiki-commons-classloader-api- Disclosed
- 26.05.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-xq3r-2qv5-vqqm - CC BY 4.0
Vulnerability history: org.xwiki.commons:xwiki-commons-classloader-api
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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