What’s Vulnerable › Vulnerabilities

CVE-2023-34251: Grav Server Side Template Injection vulnerability

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-14 · updated 2026-06-17
• Weakness: CWE-94

Description

Grav is a flat-file content management system. Versions prior to 1.7.42 are vulnerable to server side template injection. Remote code execution is possible by embedding malicious PHP code on the administrator screen by a user with page editing privileges. Version 1.7.42 contains a fix for this issue.

Affected products

• getgrav grav: before 1.7.42 — fixed in 1.7.42

How to fix

Upgrade to a fixed version: getgrav grav 1.7.42. Check the vendor advisory for mitigations.

References

• https://github.com/getgrav/grav/blob/develop/system/src/Grav/Common/Twig/Extension/GravExtension.php#L174
• https://github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5
• https://github.com/getgrav/grav/security/advisories/GHSA-f9jf-4cp4-4fq5
• https://github.com/getgrav/grav/blob/develop/system/src/Grav/Common/Twig/Extension/GravExtension.php#L174
• https://github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5
• https://github.com/getgrav/grav/security/advisories/GHSA-f9jf-4cp4-4fq5

Get alerted when CVE-2023-34251 or the next vulnerability affects your stack