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.
References
| Link | Resource |
|---|---|
| https://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197ee | Patch |
| https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6 | Exploit Vendor Advisory |
| https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6 | Exploit Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
03 Dec 2025, 18:50
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.9 |
| References | () https://github.com/getgrav/grav/commit/ed640a13143c4177af013cf001969ed2c5e197ee - Patch | |
| References | () https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6 - Exploit, Vendor Advisory | |
| First Time |
Getgrav
Getgrav grav |
|
| CPE | cpe:2.3:a:getgrav:grav:1.8.0:beta21:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta17:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta24:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta25:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta15:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta20:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta22:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta11:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta10:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta3:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta18:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta1:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta13:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta5:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta9:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta16:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta19:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta14:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta4:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta26:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta7:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta2:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta8:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta23:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta6:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta12:*:*:*:*:*:* |
02 Dec 2025, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/getgrav/grav/security/advisories/GHSA-m8vh-v6r6-w7p6 - |
01 Dec 2025, 22:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-12-01 22:15
Updated : 2025-12-03 18:50
NVD link : CVE-2025-66305
Mitre link : CVE-2025-66305
CVE.ORG link : CVE-2025-66305
JSON object : View
Products Affected
getgrav
- grav
CWE
CWE-248
Uncaught Exception