# CVE-2006-2908: Code injection in n/a

> Remote attackers can execute arbitrary PHP code via the username field in MyBB due to unsafe preg_replace usage, requiring low privileges.

- **Severity:** High 7.5 (`AV:N/AC:L/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:** 13 Jun 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-6qwc-9gff-4h4m

## What is CVE-2006-2908?

CVE-2006-2908 is a high-severity code injection vulnerability in Mybulletinboard Mybulletinboard, published on 13 Jun 2006. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The domecode function in inc/functions_post.php in MyBulletinBoard (MyBB) 1.1.2, and possibly other versions, allows remote attackers to execute arbitrary PHP code via the username field, which is used in a preg_replace function call with a /e (executable) modifier.

## Which versions are affected by CVE-2006-2908?

It affects 1 product.


Products: Mybulletinboard Mybulletinboard.

## How do I fix CVE-2006-2908?

No fix has been published for CVE-2006-2908 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-2908 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-2908 exists.

Public exploit code:

- MyBulletinBoard (MyBB) < 1.1.3 - Remote Code Execution (exploitdb)

## Other vulnerabilities in Mybulletinboard Mybulletinboard

- [CVE-2005-4200](https://insights.sbomify.com/CVE-2005-4200/): Other in n/a (critical 10.0)
- [CVE-2009-2230](https://insights.sbomify.com/CVE-2009-2230/): SQL injection in n/a (high 7.5)
- [CVE-2008-0382](https://insights.sbomify.com/CVE-2008-0382/): Code injection in n/a (high 7.5)
- [CVE-2007-2211](https://insights.sbomify.com/CVE-2007-2211/): SQL injection in n/a (high 7.5)
- [CVE-2006-3758](https://insights.sbomify.com/CVE-2006-3758/): Code injection in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-2908 and fix it if it is affected.

What it is: CVE-2006-2908 is a high-severity code injection vulnerability in Mybulletinboard Mybulletinboard, published on 13 Jun 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-2006-2908 exists.

Affected product: Mybulletinboard Mybulletinboard. 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-2006-2908/ (Markdown: https://insights.sbomify.com/CVE-2006-2908/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-2908
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-2908
- OSV: https://osv.dev/vulnerability/CVE-2006-2908

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-2908/
Summaries are generated and may contain mistakes; the official description above is the record.