What is CVE-2023-34251?

CVE-2023-34251 is a critical-severity vulnerability in Getgrav Grav, classified under Code Injection. CVSS score: 9.9/10. Published 2023-06-14.

How severe is CVE-2023-34251?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Getgrav Grav

CVE-2023-34251

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.

Vulnerability class: RCE (Remote Code Execution)

Published 2023-06-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Getgrav Grav — versions < 1.7.42

Weakness classification (CWE)

CWE-94 — Code Injection

References

github.com/getgrav/grav/security/advisories/GHSA-f9jf-4cp4-4fq5 (Exploit, Vendor Advisory)
github.com/getgrav/grav/commit/9d01140a63c77075ef09b26ef57cf186138151a5 (Patch)
github.com/getgrav/grav/blob/develop/system/src/Grav/Common/Twig/Extension/Grav… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34251?: CVE-2023-34251 is a critical-severity vulnerability in Getgrav Grav, classified under Code Injection. CVSS score: 9.9/10. Published 2023-06-14.
How severe is CVE-2023-34251?: Critical severity. CVSS v3 base score is 9.9 out of 10.