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    CVE-2026-42843

    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.

    Published:May 11, 2026
    Last Modified:May 27, 2026
    EPS:May 11, 2026
    EPSS Score:0.00044
    CVSS Score:8.8

    Affected Products

    Vendor
    Getgrav
    Product
    Grav-plugin-api

    Exploits

    https://github.com/getgrav/grav/security/advisories/GHSA-r945-h4vm-h736https://github.com/getgrav/grav/security/advisories/GHSA-r945-h4vm-h736

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High