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OpenAdvisories
Medium · 5.8 CVE-2026-21896 EUVD-2026-1473GHSA-4j78-4xrm-cr2f

Kirby is missing permission checks in the content changes API

Published Jan 8, 2026 · Updated Jan 8, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
getkirby kirby >= 5.0.0, < 5.2.2 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist getkirby/cms >= 5.0.0, < 5.2.2 5.2.2 GHSA-4j78-4xrm-cr2f

References