CVE-2025-66294 HIGH

CVE-2025-66294: Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass

Vendor Getgrav
Product grav
Weakness CWE-94 · Code injection
Published December 1, 2025
Last update December 2, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 1, 2025 CVE published
December 2, 2025 Record updated