Any user with view access to the XWiki space can change the authenticator
Impact
A user who can access pages located in the XWiki space (by default, anyone) can access the page XWiki.Authentication.Administration and (unless an authenticator is set in xwiki.cfg) switch to another installed authenticator.
Note that, by default, there is only one authenticator available (Standard XWiki Authenticator). So, if no authenticator extension was installed, it's not really possible to do anything for an attacker.
Also, in most cases, if you have installed and are using an SSO authenticator (like OIDC or LDAP for example), the worst an attacker can do is break authentication by switching back to the standard authenticator (that's because it's impossible to login to a user which does not have a stored password, and that's usually what SSO authenticator produce).
Patches
This has been patched in XWiki 15.10.9 and XWiki 16.3.0RC1.
Workarounds
You can very easily fix this vulnerability in your instance through right configuration:
- access the page and children right administration of the page
XWiki.Authentication(https://myhost/xwiki/bin/admin/XWiki/Authentication/WebPreferences?editor=spaceadmin§ion=PageAndChildrenRights&space=XWiki.Authentication#|t=usersandgroupstable&p=1&l=10&uorg=groups&wiki=local&clsname=XWiki.XWikiGlobalRights) - make sure only admin user have the VIEW right
References
https://jira.xwiki.org/browse/XWIKI-22604 https://github.com/xwiki/xwiki-platform/commit/5efc31cea1501c9a5cb593566fea8b558ff32a2a
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
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.xwiki.platform:xwiki-platform-security-authentication-ui | >= 15.3-rc-1, < 15.10.14, >= 16.0.0-rc-1, < 16.4.6, >= 16.5.0-rc-1, < 16.10.0-rc-1 | 15.10.14, 16.4.6, 16.10.0-rc-1 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-862- Platform
- Java / Kotlin (Maven)
- Package
org.xwiki.platform:xwiki-platform-security-authentication-ui- Disclosed
- 30.04.2025
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-f9c6-2f9p-82jj - CC BY 4.0
Vulnerability history: org.xwiki.platform:xwiki-platform-security-authentication-ui
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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