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GHSA-xq3r-2qv5-vqqm
org.xwiki.commons/xwiki-commons-classloader-apiorg.xwiki.commons/xwiki-commons-classloader-apiorg.xwiki.commons/xwiki-commons-classloader-apiImpact
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.
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The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2026-23734Alias
- EUVD-2026-31152Alias
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