CVE-2025-66294
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-01

Last updated on: 2025-12-04

Assigner: GitHub, Inc.

Description
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection (SSTI) vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak regex validation in the cleanDangerousTwig method. This vulnerability is fixed in 1.8.0-beta.27.
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Meta Information
Published
2025-12-01
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-12-01
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66294
Affected Vendors & Products
Showing 27 associated CPEs
Vendor Product Version / Range
getgrav grav From 1.7.48 (inc) 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
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KEV
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CWE ID Description
CWE-1336 The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Executive Summary

This vulnerability is a Server-Side Template Injection (SSTI) in the Grav web platform before version 1.8.0-beta.27. It allows authenticated users with editor permissions to execute arbitrary commands on the server. Under certain conditions, unauthenticated attackers may also exploit it. The root cause is weak regex validation in the cleanDangerousTwig method.

Impact Analysis

The vulnerability can allow attackers to execute arbitrary commands on the server, potentially leading to unauthorized access, data compromise, or disruption of services. This can result in loss of data integrity, confidentiality, and availability of the affected system.

Mitigation Strategies

Upgrade Grav to version 1.8.0-beta.27 or later, as this version contains the fix for the Server-Side Template Injection vulnerability. Additionally, restrict editor permissions to trusted users only to reduce risk until the upgrade is applied.

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