CVE-2025-66305

MediumCVSS 4.9/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.9/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-248

Affected software

No affected versions have been published.

Timeline

Published: Dec 1, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

Related CVEs from 2025

CVE-2025-663066.5Grav is a file-based Web platform. Prior to 1.8.0-beta.27, there is an IDOR (Insecure Direct Object Reference) vulnerability in the Grav CMS CVE-2025-663075.3This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-663085.4This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-663096.1This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-66317.8A maliciously crafted PRT file, when parsed through certain Autodesk products, can force an Out-of-Bounds Write vulnerability. A malicious a CVE-2025-663105.4This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-663115.4This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-663125.4This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Pr CVE-2025-663137.2ChurchCRM is an open-source church management system. In ChurchCRM 6.2.0 and earlier, there is a time-based blind SQL injection in the handl CVE-2025-663147.5Improper Privilege Management vulnerability in ZTE ElasticNet UME R32 on Linux allows Accessing Functionality Not Properly Constrained by AC CVE-2025-663158.8There is a configuration defect vulnerability in the version server of ZTE MF258K Pro products. Due to improper directory permission setting CVE-2025-663195.5Permission control vulnerability in the resource scheduling module. Impact: Successful exploitation of this vulnerability may affect service