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Vulnerability record · CVE-2025-66299 · published 1 December 2025

CVE-2025-66299: Getgrav grav code injection vulnerability

Getgrav · Grav

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.

8.8 CVSS 3.1 High EPSS 0.60% · top 53.3% CWE-94 · Code injectionCWE-1336 · CWE-1336
8.8CVSS 3.1 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
26 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458 Patch
https://github.com/getgrav/grav/security/advisories/GHSA-gjc5-8cfh-653x ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2024-34082Getgrav grav improper privilege management vulnerabilityGrav is a file-based Web platform. Prior to version 1.7.46, a low privilege user account with page edit privilege can read any server files using Twi…EPSS 3.0%9.8CVE-2025-46199Getgrav grav cross-site scripting vulnerabilityCross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to execute arbitrary code via a crafted script to the form fieldsEPSS 0.80%9.3CVE-2021-47812Getgrav grav missing authorization vulnerabilityGravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code thro…EPSS 2.2%9.1CVE-2025-66844Getgrav grav server-side request forgery (ssrf) vulnerabilityIn grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is processed by Twig and the con…EPSS 0.29%8.9CVE-2026-42611Getgrav grav cross-site scripting vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, a low-privileged (with the ability to create a page) user can cause XSS with the injection …EPSS 0.36%8.8CVE-2026-42608Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulatin…EPSS 0.52%8.8CVE-2025-66295Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 1.8.0-beta.27, when a user with privilege of user creation creates a new user through the Admin UI and su…EPSS 0.55%8.8CVE-2025-66296Getgrav grav vulnerabilityGrav 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 u…EPSS 0.32%

Source: NIST National Vulnerability Database (record CVE-2025-66299), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.