# CVE-2025-66844: Grav may be vulnerable to SSRF attack via Twig Templates

> Attackers can trigger Server-Side Request Forgery in Grav CMS via Twig templates if undefined PHP functions are allowed in configuration.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Dec 2025
- **Updated:** 16 Dec 2025
- **Also known as:** GHSA-729w-j79f-2c34

## What is CVE-2025-66844?

CVE-2025-66844 is a critical server-side request forgery vulnerability in Getgrav Grav, published on 15 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is processed by Twig and the configuration allows undefined PHP functions to be registered

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2025-66844?

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 to 1.7.49.5 | None |
| `getgrav/grav` | Packagist | All versions to 1.7.49.5 | None |

Products: Getgrav Grav.

## How do I fix CVE-2025-66844?

No fix has been published for CVE-2025-66844 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-66844 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66844 exists.

## Other vulnerabilities in Getgrav Grav

- [CVE-2023-34251](https://insights.sbomify.com/CVE-2023-34251/): Grav Server Side Template Injection vulnerability (critical 10.0)
- [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-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-2025-66844 and fix it if it is affected.

What it is: CVE-2025-66844 is a critical server-side request forgery vulnerability in Getgrav Grav, published on 15 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66844 exists.

Affected packages and fixed versions:
- getgrav/grav (Packagist): affected all versions up to 1.7.49.5; no fix listed
- getgrav/grav (Packagist): affected all versions up to 1.7.49.5; no fix listed

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-2025-66844/ (Markdown: https://insights.sbomify.com/CVE-2025-66844/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-66844
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66844
- OSV: https://osv.dev/vulnerability/CVE-2025-66844

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-66844/
Summaries are generated and may contain mistakes; the official description above is the record.