CVE-2022-31166: XWiki Platform Old Core is a core package for XWiki Platform, a generic wiki platform. Starting in versions 11.3.7, 11.0.3, and 12.0RC1, it is possibl...

Description

XWiki Platform Old Core is a core package for XWiki Platform, a generic wiki platform. Starting in versions 11.3.7, 11.0.3, and 12.0RC1, it is possible to exploit a bug in XWikiRights resolution of groups to obtain privilege escalation. More specifically, editing a right with the object editor leads to adding a supplementary empty value to groups which is then resolved as a reference to XWiki.WebHome page. Adding an XWikiGroup xobject to that page then transforms it to a group, any user put in that group would then obtain the privileges related to the edited right. Note that this security issue is normally mitigated by the fact that XWiki.WebHome (and XWiki space in general) should be protected by default for edit rights. The problem has been patched in XWiki 13.10.4 and 14.2RC1 to not consider anymore empty values in XWikiRights. It's possible to work around the problem by setting appropriate rights on XWiki.WebHome page to prevent users to edit it.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.11%

61.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Xwiki	Xwiki	>= 11.3.7, < 13.10.4
Xwiki	Xwiki	>= 14.0, < 14.2

References

https://github.com/xwiki/xwiki-platform/pull/1800Patch, Third Party Advisory
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-g4h6-qp44-wqvxThird Party Advisory
https://jira.xwiki.org/browse/XWIKI-15776Vendor Advisory
https://jira.xwiki.org/browse/XWIKI-18386Exploit, Permissions Required, Vendor Advisory
https://github.com/xwiki/xwiki-platform/pull/1800Patch, Third Party Advisory
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-g4h6-qp44-wqvxThird Party Advisory
https://jira.xwiki.org/browse/XWIKI-15776Vendor Advisory
https://jira.xwiki.org/browse/XWIKI-18386Exploit, Permissions Required, Vendor Advisory

Timeline

Published: Sep 7, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-31166?

XWiki Platform Old Core is a core package for XWiki Platform, a generic wiki platform. Starting in versions 11.3.7, 11.0.3, and 12.0RC1, it is possible to exploit a bug in XWikiRights resolution of groups to obtain privilege escalation. More specifically, editing a right with the object editor leads to adding a supplementary empty value to groups which is then resolved as a reference to XWiki.WebHome page. Adding an XWikiGroup xobject to that page then transforms it to a group, any user put in that group would then obtain the privileges related to the edited right. Note that this security issue is normally mitigated by the fact that XWiki.WebHome (and XWiki space in general) should be protected by default for edit rights. The problem has been patched in XWiki 13.10.4 and 14.2RC1 to not consider anymore empty values in XWikiRights. It's possible to work around the problem by setting appropriate rights on XWiki.WebHome page to prevent users to edit it.

How severe is CVE-2022-31166?

CVE-2022-31166 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.11% probability of exploitation in the next 30 days.

How do I fix CVE-2022-31166?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.