CVE-2026-42174 Kirby: User avatar creation, replacement and deletion are not gated by user update permissions

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, user avatar creation, replacement and deletion are not gated by user update permissions. This issue has been patched in versions 4.9.0 and 5.4.0...

CVE-2026-42174 Kirby: User avatar creation, replacement and deletion are not gated by user update permissions

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, user avatar creation, replacement and deletion are not gated by user update permissions. This issue has been patched in versions 4.9.0 and 5.4.0...

CVE-2026-42174

Kirby CMS (CVE-2026-42174) is vulnerable prior to updates 4.9.0 and 5.4.0: user avatars could be created, replaced, or deleted without proper user.update/users.update permission checks. The root cause is missing authorization gating for avatar actions, allowing users with only file permissions to...