BaseFortify

Publication date: 2025-12-01

Last updated on: 2025-12-03

Assigner: GitHub, Inc.

Description

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute arbitrary system commands via the scheduler API. This results in both Privilege Escalation (PE) and Remote Code Execution (RCE) vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-12-01

Last Modified

2025-12-03

Generated

2026-07-06

AI Q&A

2025-12-01

EPSS Evaluated

2026-07-05

NVD

CVE-2025-66297

Affected Vendors & Products

Vendor	Product	Version / Range
getgrav	grav	to 1.8.0 (exc)
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0
getgrav	grav	1.8.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1336	The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Grav CMS versions prior to 1.8.0-beta.27. A user who already has admin panel access and permissions to create or edit pages can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin level or execute arbitrary system commands through the scheduler API. This leads to both Privilege Escalation and Remote Code Execution vulnerabilities.

Impact Analysis

If exploited, this vulnerability allows an attacker with limited admin panel access to escalate their privileges to full admin rights or execute arbitrary system commands on the server. This can lead to unauthorized control over the system, data breaches, and potentially full compromise of the affected Grav CMS installation.

Mitigation Strategies

Upgrade Grav CMS to version 1.8.0-beta.27 or later, as this version contains the fix for the vulnerability. Additionally, restrict admin panel access and permissions to only trusted users to prevent exploitation via malicious Twig expressions.

Hi! I’m here to help you understand CVE-2025-66297. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70