# CVE-2006-4450: Server-side request forgery in n/a

> Remote attackers can use the server as a web proxy via the avatar URL feature, enabling Server-Side Request Forgery attacks.

- **Severity:** Medium 5.1 (`AV:N/AC:H/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-wgpr-g56x-xxhp

## What is CVE-2006-4450?

CVE-2006-4450 is a medium-severity server-side request forgery vulnerability in Phpbb Group Phpbb, published on 30 Aug 2006. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

usercp_avatar.php in PHPBB 2.0.20, when avatar uploading is enabled, allows remote attackers to use the server as a web proxy by submitting a URL to the avatarurl parameter, which is then used in an HTTP GET request.

## Which versions are affected by CVE-2006-4450?

It affects 1 product.


Products: Phpbb Group Phpbb.

## How do I fix CVE-2006-4450?

No fix has been published for CVE-2006-4450 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-4450 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-4450 exists.

Public exploit code:

- phpBB 2.0.20 - Unauthorized HTTP Proxy (exploitdb)

## Other vulnerabilities in Phpbb Group Phpbb

- [CVE-2007-1695](https://insights.sbomify.com/CVE-2007-1695/): File upload in n/a (critical 10.0)
- [CVE-2006-6839](https://insights.sbomify.com/CVE-2006-6839/): Open redirect in n/a (critical 10.0)
- [CVE-2006-6840](https://insights.sbomify.com/CVE-2006-6840/): Other in n/a (critical 10.0)
- [CVE-2006-6841](https://insights.sbomify.com/CVE-2006-6841/): Cross-site request forgery in n/a (critical 10.0)
- [CVE-2002-2176](https://insights.sbomify.com/CVE-2002-2176/): SQL injection in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4450 and fix it if it is affected.

What it is: CVE-2006-4450 is a medium-severity server-side request forgery vulnerability in Phpbb Group Phpbb, published on 30 Aug 2006. 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-2006-4450 exists.

Affected product: Phpbb Group Phpbb. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2006-4450/ (Markdown: https://insights.sbomify.com/CVE-2006-4450/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4450
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4450
- OSV: https://osv.dev/vulnerability/CVE-2006-4450

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4450/
Summaries are generated and may contain mistakes; the official description above is the record.