CVE-2026-42843: CWE-863: Incorrect Authorization in getgrav grav-plugin-api
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content, media, configuration, users, and system management. Prior to 1.0.0-beta.15, an insecure direct object reference and logic flaw in the Grav API plugin (UsersController::update) allows any authenticated user with basic API access (api.access) to modify their own permission configuration. An attacker can exploit this to escalate their privileges to Super Administrator (admin.super and api.super), leading to full system compromise and potential RCE. This vulnerability is fixed in 1.0.0-beta.15.
AI Analysis
Technical Summary
The Grav API Plugin provides RESTful API access to Grav CMS content and management features. Before version 1.0.0-beta.15, a logic flaw and insecure direct object reference in the UsersController::update method allowed authenticated users with basic API access (api.access) to alter their permission configuration. This improper authorization enables privilege escalation to Super Administrator roles (admin.super and api.super), which can result in complete system compromise and possible remote code execution. The issue is tracked as CWE-863 and has a CVSS 3.1 score of 8.8, indicating high impact. The vulnerability is resolved in version 1.0.0-beta.15.
Potential Impact
Exploitation of this vulnerability allows an authenticated user with basic API access to escalate their privileges to Super Administrator, granting full control over the Grav CMS instance. This can lead to complete system compromise, including unauthorized access to all content, configuration, user data, and the potential for remote code execution. The high CVSS score reflects the critical impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the grav-plugin-api to version 1.0.0-beta.15 or later, where this vulnerability is fixed. There is no indication of alternative mitigations or temporary fixes. Patch status is not explicitly confirmed beyond the version fix; therefore, users should verify the upgrade with the vendor's official advisory or release notes before deployment.
CVE-2026-42843: CWE-863: Incorrect Authorization in getgrav grav-plugin-api
Description
Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content, media, configuration, users, and system management. Prior to 1.0.0-beta.15, an insecure direct object reference and logic flaw in the Grav API plugin (UsersController::update) allows any authenticated user with basic API access (api.access) to modify their own permission configuration. An attacker can exploit this to escalate their privileges to Super Administrator (admin.super and api.super), leading to full system compromise and potential RCE. This vulnerability is fixed in 1.0.0-beta.15.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Grav API Plugin provides RESTful API access to Grav CMS content and management features. Before version 1.0.0-beta.15, a logic flaw and insecure direct object reference in the UsersController::update method allowed authenticated users with basic API access (api.access) to alter their permission configuration. This improper authorization enables privilege escalation to Super Administrator roles (admin.super and api.super), which can result in complete system compromise and possible remote code execution. The issue is tracked as CWE-863 and has a CVSS 3.1 score of 8.8, indicating high impact. The vulnerability is resolved in version 1.0.0-beta.15.
Potential Impact
Exploitation of this vulnerability allows an authenticated user with basic API access to escalate their privileges to Super Administrator, granting full control over the Grav CMS instance. This can lead to complete system compromise, including unauthorized access to all content, configuration, user data, and the potential for remote code execution. The high CVSS score reflects the critical impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the grav-plugin-api to version 1.0.0-beta.15 or later, where this vulnerability is fixed. There is no indication of alternative mitigations or temporary fixes. Patch status is not explicitly confirmed beyond the version fix; therefore, users should verify the upgrade with the vendor's official advisory or release notes before deployment.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-30T16:44:48.376Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a022c3bcbff5d86104f7da4
Added to database: 5/11/2026, 7:21:31 PM
Last enriched: 5/11/2026, 7:36:40 PM
Last updated: 5/12/2026, 3:52:06 AM
Views: 5
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