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
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Getgrav |
|
Configuration 1 [-]
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No data.
References
History
Wed, 03 Dec 2025 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta10:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta11:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta12:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta13:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta14:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta15:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta16:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta17:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta18:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta19:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta1:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta20:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta21:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta22:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta23:*:*:*:*:*:* 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:beta26:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta2:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta3:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta4:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta5:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta6:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta7:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta8:*:*:*:*:*:* cpe:2.3:a:getgrav:grav:1.8.0:beta9:*:*:*:*:*:* |
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| Metrics |
cvssV3_1
|
Tue, 02 Dec 2025 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 02 Dec 2025 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Getgrav
Getgrav grav |
|
| Vendors & Products |
Getgrav
Getgrav grav |
Mon, 01 Dec 2025 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Grav vulnerable to Denial of Service via Improper Input Handling in 'Supported' Parameter | |
| Weaknesses | CWE-248 | |
| References |
| |
| Metrics |
cvssV4_0
|
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-12-01T21:43:29.725Z
Updated: 2025-12-02T20:14:21.770Z
Reserved: 2025-11-26T23:11:46.395Z
Link: CVE-2025-66305
Vulnrichment
Updated: 2025-12-02T20:14:02.932Z
NVD
Status : Analyzed
Published: 2025-12-01T22:15:50.250
Modified: 2025-12-03T18:50:11.847
Link: CVE-2025-66305
Redhat
No data.