CVE-2026-41325: CWE-863: Incorrect Authorization in getkirby kirby
CVE-2026-41325 is a high-severity authorization vulnerability in the Kirby CMS prior to versions 4. 9. 0 and 5. 4. 0. It allows an attacker with limited privileges to override user permissions during the creation of pages, files, and users by injecting custom dynamic blueprint configurations. This injection could enable unauthorized creation actions that bypass the intended permission controls. The vulnerability has been patched in Kirby versions 4. 9. 0 and 5.
AI Analysis
Technical Summary
Kirby CMS uses user and model blueprints to define permissions controlling user actions on content models. Before versions 4.9.0 and 5.4.0, Kirby allowed injection of dynamic blueprint configurations during creation of pages, files, and users. This injection could override the 'create' permission, effectively bypassing authorization checks. The issue is classified as CWE-863 (Incorrect Authorization). The patch introduced in Kirby 4.9.0 and 5.4.0 updates the normalization code to filter the blueprint property, preventing injection of unauthorized configuration during creation requests.
Potential Impact
An attacker with at least limited privileges could exploit this vulnerability to perform unauthorized creation of pages, files, or users by injecting blueprint options that override configured permissions. This could lead to unauthorized content creation or user account creation within the CMS, potentially impacting the integrity and security of the site content and user management.
Mitigation Recommendations
Upgrade Kirby CMS to version 4.9.0 or later if using the 4.x branch, or to version 5.4.0 or later if using the 5.x branch. These versions include an official fix that prevents injection of dynamic blueprint configurations during creation requests. No other mitigation is indicated by the vendor advisory.
CVE-2026-41325: CWE-863: Incorrect Authorization in getkirby kirby
Description
CVE-2026-41325 is a high-severity authorization vulnerability in the Kirby CMS prior to versions 4. 9. 0 and 5. 4. 0. It allows an attacker with limited privileges to override user permissions during the creation of pages, files, and users by injecting custom dynamic blueprint configurations. This injection could enable unauthorized creation actions that bypass the intended permission controls. The vulnerability has been patched in Kirby versions 4. 9. 0 and 5.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Kirby CMS uses user and model blueprints to define permissions controlling user actions on content models. Before versions 4.9.0 and 5.4.0, Kirby allowed injection of dynamic blueprint configurations during creation of pages, files, and users. This injection could override the 'create' permission, effectively bypassing authorization checks. The issue is classified as CWE-863 (Incorrect Authorization). The patch introduced in Kirby 4.9.0 and 5.4.0 updates the normalization code to filter the blueprint property, preventing injection of unauthorized configuration during creation requests.
Potential Impact
An attacker with at least limited privileges could exploit this vulnerability to perform unauthorized creation of pages, files, or users by injecting blueprint options that override configured permissions. This could lead to unauthorized content creation or user account creation within the CMS, potentially impacting the integrity and security of the site content and user management.
Mitigation Recommendations
Upgrade Kirby CMS to version 4.9.0 or later if using the 4.x branch, or to version 5.4.0 or later if using the 5.x branch. These versions include an official fix that prevents injection of dynamic blueprint configurations during creation requests. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-20T14:01:46.672Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69eac1fc87115cfb688c86f7
Added to database: 4/24/2026, 1:06:04 AM
Last enriched: 4/24/2026, 1:21:03 AM
Last updated: 4/24/2026, 3:18:22 AM
Views: 7
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