CVE-2025-66297
Unknown Unknown - Not Provided
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.
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Meta Information
Published
2025-12-01
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-12-01
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66297
Affected Vendors & Products
Showing 27 associated CPEs
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
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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
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KEV
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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.
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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.

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