CVE-2026-21896

Description

Kirby is an open-source content management system. From versions 5.0.0 to 5.2.1, Kirby is missing permission checks in the content changes API. This vulnerability affects all Kirby sites where user permissions are configured to prevent specific role(s) from performing write actions, specifically by disabling the update permission with the intent to prevent modifications to site content. This vulnerability does not affect those who have not altered the deviated from default user permissions. This issue has been patched in version 5.2.2.

References

https://github.com/getkirby/kirby/security/advisories/GHSA-4j78-4xrm-cr2f

https://github.com/getkirby/kirby/releases/tag/5.2.2

https://github.com/getkirby/kirby/commit/f5ce1347b427b819bf193acf11fd0da232f7af47

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS