🛡️ CVE-2025-66299
🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-1336 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection (SSTI) that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Since the security sandbox does not fully protect the Twig object, it is possible to interact with it (e.g., call methods, read/write attributes) through maliciously crafted Twig template directives injected into a web page. This allows an authenticated editor to add arbitrary functions to the Twig attribute system.twig.safe_filters, effectively bypassing the Grav CMS sandbox. This vulnerability is fixed in 1.8.0-beta.27.

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-1336
Public Exploit ✅ No
Source NVD
Published 2025-12-02
Updated 2026-06-02
Modified 2025-12-02

Affected Packages

Software From version Fixed in
getgrav/grav 1.8.0-beta.27
grav

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