CVE-2026-42174: CWE-862: Missing Authorization in getkirby kirby
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.
AI Analysis
Technical Summary
Kirby versions before 4.9.0 and between 5.0.0 and 5.4.0 contain a missing authorization vulnerability (CWE-862) affecting user avatar management functions. Specifically, the operations to create, replace, or delete user avatars are not properly gated by user update permissions, potentially allowing unauthorized users with limited privileges to perform these actions. This issue is fixed in versions 4.9.0 and 5.4.0.
Potential Impact
The vulnerability allows users with limited privileges to create, replace, or delete avatars without proper authorization. This could lead to unauthorized modifications of user profile avatars, potentially impacting user identity representation within the system. There is no indication of further privilege escalation or broader system compromise from the provided data.
Mitigation Recommendations
Upgrade Kirby to version 4.9.0 or later in the 4.x branch, or to version 5.4.0 or later in the 5.x branch, where this authorization issue has been patched. Since the vendor advisory confirms the fix in these versions, applying these updates fully mitigates the vulnerability. No additional mitigations are indicated.
CVE-2026-42174: CWE-862: Missing Authorization in getkirby kirby
Description
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.
CVSS v4.0
Score 5.3medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Kirby versions before 4.9.0 and between 5.0.0 and 5.4.0 contain a missing authorization vulnerability (CWE-862) affecting user avatar management functions. Specifically, the operations to create, replace, or delete user avatars are not properly gated by user update permissions, potentially allowing unauthorized users with limited privileges to perform these actions. This issue is fixed in versions 4.9.0 and 5.4.0.
Potential Impact
The vulnerability allows users with limited privileges to create, replace, or delete avatars without proper authorization. This could lead to unauthorized modifications of user profile avatars, potentially impacting user identity representation within the system. There is no indication of further privilege escalation or broader system compromise from the provided data.
Mitigation Recommendations
Upgrade Kirby to version 4.9.0 or later in the 4.x branch, or to version 5.4.0 or later in the 5.x branch, where this authorization issue has been patched. Since the vendor advisory confirms the fix in these versions, applying these updates fully mitigates the vulnerability. No additional mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-25T01:53:21.582Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ffe1afcbff5d8610eac9fd
Added to database: 05/10/2026, 01:38:55 UTC
Last enriched: 05/17/2026, 10:42:17 UTC
Last updated: 07/03/2026, 20:51:27 UTC
Views: 80
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.