VULNERABILITY INTELLIGENCE

CVE-2026-21896

CVSS score5.7 MEDIUM
EPSS probability0.23%
CISA KEVNot currently listed
Published2026-01-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-863

Primary references