CVE-2026-42174: CWE-862: Missing Authorization in getkirby kirby
Kirby CMS versions prior to 4. 9. 0 and between 5. 0. 0 and 5. 4. 0 have a missing authorization vulnerability where user avatar creation, replacement, and deletion are not properly restricted by user update permissions. This allows users with limited privileges to perform avatar modifications without proper authorization. The issue has been fixed in versions 4. 9.
AI Analysis
Technical Summary
CVE-2026-42174 is a missing authorization vulnerability (CWE-862) in the Kirby content management system. Specifically, in versions before 4.9.0 and between 5.0.0 and 5.4.0, the operations related to user avatar management (creation, replacement, deletion) are not gated by the required user update permissions. This flaw permits users with limited privileges to modify avatars without proper authorization controls. The vulnerability has been addressed in Kirby versions 4.9.0 and 5.4.0.
Potential Impact
Users with limited privileges can modify user avatars without proper authorization, potentially leading to unauthorized changes in user profile representations. The CVSS 4.0 base score is 5.3 (medium severity), indicating a moderate impact due to the lack of required authorization checks on avatar management functions. There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade Kirby to version 4.9.0 or later in the 4.x series, or to version 5.4.0 or later in the 5.x series, where this authorization issue has been patched. Patch status is confirmed by the vendor's versioning information. No additional mitigation is indicated.
CVE-2026-42174: CWE-862: Missing Authorization in getkirby kirby
Description
Kirby CMS versions prior to 4. 9. 0 and between 5. 0. 0 and 5. 4. 0 have a missing authorization vulnerability where user avatar creation, replacement, and deletion are not properly restricted by user update permissions. This allows users with limited privileges to perform avatar modifications without proper authorization. The issue has been fixed in versions 4. 9.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42174 is a missing authorization vulnerability (CWE-862) in the Kirby content management system. Specifically, in versions before 4.9.0 and between 5.0.0 and 5.4.0, the operations related to user avatar management (creation, replacement, deletion) are not gated by the required user update permissions. This flaw permits users with limited privileges to modify avatars without proper authorization controls. The vulnerability has been addressed in Kirby versions 4.9.0 and 5.4.0.
Potential Impact
Users with limited privileges can modify user avatars without proper authorization, potentially leading to unauthorized changes in user profile representations. The CVSS 4.0 base score is 5.3 (medium severity), indicating a moderate impact due to the lack of required authorization checks on avatar management functions. There is no indication of known exploits in the wild.
Mitigation Recommendations
Upgrade Kirby to version 4.9.0 or later in the 4.x series, or to version 5.4.0 or later in the 5.x series, where this authorization issue has been patched. Patch status is confirmed by the vendor's versioning information. No additional mitigation is 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: 5/10/2026, 1:38:55 AM
Last enriched: 5/10/2026, 1:39:39 AM
Last updated: 5/10/2026, 8:14:03 AM
Views: 10
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