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, due to improper authorization checks when modifying critical fields on a POST request to /admin/pages/{page_name}, an editor with only permissions to change basic content on the form is now able to change the functioning of the form through modifying the content of the data[_json][header][form] which is the YAML frontmatter which includes the process section which dictates what happens after a user submits the form which include some important actions that could lead to further 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-2025-66301

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-285	The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability in Grav, a file-based web platform, occurs because of improper authorization checks when modifying critical fields via a POST request to /admin/pages/{page_name}. An editor with limited permissions to change only basic content can exploit this flaw to modify the YAML frontmatter, specifically the process section of a form. This section controls what happens after a user submits the form, and altering it can change the form's behavior, potentially leading to further security issues. The vulnerability is fixed in version 1.8.0-beta.27.

Impact Analysis

This vulnerability allows an editor with limited permissions to escalate their control by modifying the form's processing behavior after submission. This could lead to unauthorized actions being executed, potentially resulting in further vulnerabilities or exploitation within the web platform, compromising the integrity and security of the application.

Mitigation Strategies

Upgrade Grav to version 1.8.0-beta.27 or later, as this version contains the fix for the improper authorization checks vulnerability.

Hi! I’m here to help you understand CVE-2025-66301. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70