XWiki.WebHome vulnerable to Improper Privilege Management in XWiki resolving groups

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2022-31166: 1.48% estimated exploitation activity in the next 30 days; percentile 74.00 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact It's 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. Patches The problem has been patched in XWiki 13.10.4 and 14.2RC1 to not consider anymore empty values in XWikiRights. Workarounds It's possible to workaround the problem by setting appropriate rights on XWiki.WebHome page to prevent users to edit it. References https://jira.xwiki.org/browse/XWIKI-18386 https://jira.xwiki.org/browse/XWIKI-15776 For more information If you have any questions or…

Published by the source

20 Sep 2022, 21:19 UTC

Last modified by the source

29 Jan 2023, 05:03 UTC

Source last checked

26 Oct 2026, 16:02 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-g4h6-qp44-wqvx

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# Patch Next advisory brief: CVE-2022-31166

Advisory: XWiki.WebHome vulnerable to Improper Privilege Management in XWiki resolving groups
IDs: CVE-2022-31166, GHSA-g4h6-qp44-wqvx
Record: https://patchnext.com/advisories/cve-2022-31166 (revision 1, source checked 26 Oct 2026, 16:02 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.xwiki.platform:xwiki-platform-oldcore 14.2-rc-1, 13.10.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.xwiki.platform:xwiki-platform-oldcore: affected >= 11.3.7, < 13.10.4; >= 14.0-rc-1, < 14.2-rc-1; fixed in 14.2-rc-1, 13.10.4

## Suggested inspection (read-only)
- Maven org.xwiki.platform:xwiki-platform-oldcore: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.xwiki.platform:xwiki-platform-oldcore.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g4h6-qp44-wqvx (GitHub-reviewed advisory GHSA-g4h6-qp44-wqvx lists affected ranges: Maven org.xwiki.platform:xwiki-platform-oldcore >=11.3.7 =14.0-rc-1 <14.2-rc-1)

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