CVE-2026-42843

HIGH

grav-plugin-api: Grav API Privilege Escalation to Super Admin

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.8
EPSS 0.0035
EPSS Percentile 26.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-863
Status published
Products (3)
getgrav/grav-plugin-api 1.0.0 beta1 (14 CPE variants)
getgrav/grav-plugin-api 0 - 1.0.0-beta.15Packagist
getgrav/grav-plugin-api < 1.0.0-beta.15
Published May 11, 2026
Tracked Since May 11, 2026