CVE-2025-66294: Getgrav Grav

High severity, CVSS 8.8. EPSS: 2.8% chance of exploitation in the next 30 days.

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection (SSTI) vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak regex validation in the cleanDangerousTwig method. This vulnerability is fixed in 1.8.0-beta.27.

Affected products

• Getgrav Grav: from 1.7.48, before 1.8.0 (fixed in 1.8.0); version 1.8.0 only

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