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

> An attacker with page editing privileges can execute arbitrary code via server-side template injection in Grav CMS.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jun 2023
- **Updated:** 27 Dec 2024
- **Also known as:** GHSA-f9jf-4cp4-4fq5

## 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 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2023-34251?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `getgrav/grav` | Packagist | All versions | 1.7.42 |
| `getgrav/grav` | Packagist | All versions | 1.7.42 |

Products: Getgrav Grav.

## How do I fix CVE-2023-34251?

Upgrade getgrav/grav to 1.7.42 or later.

## 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](https://insights.sbomify.com/CVE-2025-46199/): Cross-site scripting in n/a (critical 9.8)
- [CVE-2021-47812](https://insights.sbomify.com/CVE-2021-47812/): GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) (critical 9.3)
- [CVE-2025-66844](https://insights.sbomify.com/CVE-2025-66844/): Grav may be vulnerable to SSRF attack via Twig Templates (critical 9.1)
- [CVE-2022-2073](https://insights.sbomify.com/CVE-2022-2073/): Code Injection in getgrav/grav (critical 9.1)
- [CVE-2026-42611](https://insights.sbomify.com/CVE-2026-42611/): Grav: Stored XSS via Tag Injection (high 8.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-34251 and fix it if it is affected.

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

Affected packages and fixed versions:
- getgrav/grav (Packagist): affected all versions; fixed in 1.7.42
- getgrav/grav (Packagist): affected all versions; fixed in 1.7.42

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-34251/ (Markdown: https://insights.sbomify.com/CVE-2023-34251/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-34251
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-34251
- OSV: https://osv.dev/vulnerability/CVE-2023-34251

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-34251/
Summaries are generated and may contain mistakes; the official description above is the record.