CVE-2023-34251 Grav Server Side Template Injection vulnerability

What is CVE-2023-34251?

CVE-2023-34251 is a critical code injection vulnerability in Getgrav Grav, published on 14 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-94

Which versions are affected by CVE-2023-34251?

2 open source packages ship an affected version, including getgrav/grav. It affects 1 product.

Products include Getgrav Grav.

How do I fix CVE-2023-34251?

Upgrade getgrav/grav to 1.7.42 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-34251 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34251 exists.

Other vulnerabilities in Getgrav Grav

• CVE-2025-46199 Cross-site scripting in n/a Critical 9.8
• CVE-2021-47812 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) Critical 9.3
• CVE-2025-66844 Grav may be vulnerable to SSRF attack via Twig Templates Critical 9.1
• CVE-2022-2073 Code Injection in getgrav/grav Critical 9.1
• CVE-2026-42611 Grav: Stored XSS via Tag Injection High 8.9

All Getgrav Grav vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f9jf-4cp4-4fq5.