CVE-2024-28119

Grav vulnerable to Server Side Template Injection (SSTI) via Twig escape handler

Grav is an open-source, flat-file content management system. Prior to version 1.7.45, due to the unrestricted access to twig extension class from grav context, an attacker can redefine the escape function and execute arbitrary commands. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. Version 1.7.45 contains a patch for this issue.

Affected

getgrav · grav

CVSS v3.1 NVD

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.58% chance of exploitation in the next 30 days, 75th percentile

Published

2024-03-21

Updated

2024-08-21

Proof-of-concept exploits (1)

• getgrav/grav/security/advisories/GHSA-2m7x-c7px-hp58

Security advisories

• advisories/GHSA-2m7x-c7px-hp58
• getgrav/grav/commit/de1ccfa12dbcbf526104d68c1a6bc202a98698fe
• twigphp/Twig/blob/3.x/src/Extension/EscaperExtension.php#L99

References

• CVE Record
• NVD entry