CVE-2025-66296: Getgrav Grav

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a privilege escalation vulnerability exists in Grav’s Admin plugin due to the absence of username uniqueness validation when creating users. A user with the create user permission can create a new account using the same username as an existing administrator account, set a new password/email, and then log in as that administrator. This effectively allows privilege escalation from limited user-manager permissions to full administrator access. This vulnerability is fixed in 1.8.0-beta.27.

Affected products

• Getgrav Grav: from 1.7.49.5, before 1.8.0 (fixed in 1.8.0); version 1.8.0 only

Published 2025-12-01. Last modified 2026-09-26.