# GHSA-vcg6-8fxc-x5cq: silverstripe/framework allows upload of dangerous file types

> A malicious CMS user can upload dangerous file types like .js or .jar to execute code in the website's security context.

- **Severity:** Not scored
- **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:** 27 May 2024

## What is GHSA-vcg6-8fxc-x5cq?

GHSA-vcg6-8fxc-x5cq is a vulnerability in silverstripe/framework, published on 27 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Some potentially dangerous file types exist in File.allowed_extensions which could allow a malicious CMS user to upload files that then get executed in the security context of the website. We have removed the ability to upload .css, .js, .potm, .dotm, .xltm and .jar files in the default configuration. Since allowed_extensions are synced to webserver configuration (in assets/.htaccess) automatically, this will also deny access to any existing uploads with these extensions.

Review our security guidelines for the Common Web Platform and the File Security guide for SilverStripe 4 to find out how to add or remove extensions.

## Which versions are affected by GHSA-vcg6-8fxc-x5cq?

6 open source packages ship an affected version, including silverstripe/framework.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `silverstripe/framework` | Packagist | From 3.6.5-rc1 | 3.6.6 |
| `silverstripe/framework` | Packagist | From 3.6.5-rc1 | 3.6.6 |
| `silverstripe/framework` | Packagist | From 4.0.3-rc1 | 4.0.4 |
| `silverstripe/framework` | Packagist | From 4.0.3-rc1 | 4.0.4 |
| `silverstripe/framework` | Packagist | From 4.1.0-rc1 | 4.1.1 |
| `silverstripe/framework` | Packagist | From 4.1.0-rc1 | 4.1.1 |

## How do I fix GHSA-vcg6-8fxc-x5cq?

Upgrade silverstripe/framework to a fixed version for your release line: 3.6.6, 4.0.4 or 4.1.1.

## Is GHSA-vcg6-8fxc-x5cq being exploited?

There is no known exploitation of GHSA-vcg6-8fxc-x5cq in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-vcg6-8fxc-x5cq and fix it if it is affected.

What it is: GHSA-vcg6-8fxc-x5cq is a vulnerability in silverstripe/framework, published on 27 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-vcg6-8fxc-x5cq in the wild and no public exploit code.

Affected packages and fixed versions:
- silverstripe/framework (Packagist): affected from 3.6.5-rc1; fixed in 3.6.6
- silverstripe/framework (Packagist): affected from 3.6.5-rc1; fixed in 3.6.6
- silverstripe/framework (Packagist): affected from 4.0.3-rc1; fixed in 4.0.4
- silverstripe/framework (Packagist): affected from 4.0.3-rc1; fixed in 4.0.4
- silverstripe/framework (Packagist): affected from 4.1.0-rc1; fixed in 4.1.1
- silverstripe/framework (Packagist): affected from 4.1.0-rc1; fixed in 4.1.1

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/GHSA-vcg6-8fxc-x5cq/ (Markdown: https://insights.sbomify.com/GHSA-vcg6-8fxc-x5cq/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-vcg6-8fxc-x5cq

---
From sbomify Insights: https://insights.sbomify.com/GHSA-vcg6-8fxc-x5cq/
Summaries are generated and may contain mistakes; the official description above is the record.