CVE-2025-66294
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Grav
PublishedDec 1, 2025
First seenDec 1, 2025
Weakness typeCWE-94Code injectionCWE-1336CWE-1336
How to fix
Update
- getgrav grav1.8.0 or later
- getgrav/grav1.8.0-beta.27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getgrav grav | 1.7.48 ≤ v < 1.8.0, 1.8.0 | 1.8.0 |
| getgrav/gravPackagist | v < 1.8.0-beta.27 | 1.8.0-beta.27 |
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