Description

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Denial of Service (DoS) vulnerability was identified in the "Languages" submenu of the Grav admin configuration panel (/admin/config/system). Specifically, the Supported parameter fails to properly validate user input. If a malformed value is inserted—such as a single forward slash (/) or an XSS test string—it causes a fatal regular expression parsing error on the server. This leads to application-wide failure due to the use of the preg_match() function with an improperly constructed regular expression, resulting in an error. Once triggered, the site becomes completely unavailable to all users. This vulnerability is fixed in 1.8.0-beta.27.

INFO

Published Date :

2025-12-01T21:43:29.725Z

Last Modified :

2025-12-02T20:14:21.770Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2025-66305 vulnerability.

Vendors Products
Getgrav
  • Grav
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66305.

URL Resource
https://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197ee cve-icon cve-icon
https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6 cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact