CVE-2021-29440
Twig allowing dangerous PHP functions by default
HIGH 7.2EPSS 29.9%
Grav is a file based Web-platform. 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. The issue was addressed in version 1.7.11.
- Affected
- getgrav · grav
- CVSS v3.1 NVD
- 7.2 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 GITHUB
- 8.4 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P - EPSS
- 29.90% chance of exploitation in the next 30 days, 98th percentile
- Published
- 2021-04-13
- Updated
- 2024-08-03
Proof-of-concept exploits (3)
- http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injectio…
- https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities
- CsEnox/CVE-2021-294404★ · 2021-06-06
ExploitDB entries (1)
Security advisories
- getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc
- https://packagist.org/packages/getgrav/grav
- advisories/GHSA-g8r4-p96j-xfxc