XWiki Platform has path traversal via resources parameter in ssx and jsx endpoints when using leading slash

CRITICAL 9.3CVE-2026-23734 · GHSA-xq3r-2qv5-vqqm · Published 20/05/2026 · updated 23/07/2026

Package	Affected versions	Patched versions
org.xwiki.commons:xwiki-commons-classloader-api Maven	`≥ 17.0.0-rc-1, < 17.4.9≥ 17.5.0, < 17.10.3≥ 18.0.0-rc-1, < 18.1.0-rc-1≥ 4.2-milestone-2, < 16.10.17`	`17.4.917.10.318.1.0-rc-116.10.17`

Description

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

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.

NVD 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.

References

xwiki/xwiki-commons security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-23734 · ADVISORY
xwiki/xwiki-commons commit a979caf · WEB
xwiki/xwiki-commons · PACKAGE
jira.xwiki.org/browse/XCOMMONS-3547 · WEB

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Package

Affected versions

Patched versions

org.xwiki.commons:xwiki-commons-classloader-api

Maven

≥ 17.0.0-rc-1, < 17.4.9≥ 17.5.0, < 17.10.3≥ 18.0.0-rc-1, < 18.1.0-rc-1≥ 4.2-milestone-2, < 16.10.17

17.4.917.10.318.1.0-rc-116.10.17

Description

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

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.

NVD description