Missing Authorization Affecting getkirby/cms package, versions <4.9.0>=5.0.0, <5.4.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published5 May 2026
- disclosed4 May 2026
- creditUnknown
Introduced: 4 May 2026
NewCVE-2026-42174 (opens in a new tab)How to fix?
Upgrade getkirby/cms to version 4.9.0, 5.4.0 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization in the process for managing user avatars due to insufficient authorization checks. An attacker can gain unauthorized access to create, replace, or delete user avatars by leveraging file permissions without the intended user update permissions. This is only exploitable if users are assigned roles that lack user update permissions but retain file permissions for avatar actions.