# CVE-2013-4211: Code injection in Ad Server

> Remote attackers can execute arbitrary PHP code via a backdoor in the bundled flowplayer library within OpenX Ad Server.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Feb 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-h3vw-j3r5-fjqq

## What is CVE-2013-4211?

CVE-2013-4211 is a critical code injection vulnerability in OpenX Ad Server, published on 14 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A Code Execution Vulnerability exists in OpenX Ad Server 2.8.10 due to a backdoor in flowplayer-3.1.1.min.js library, which could let a remote malicious user execute arbitrary PHP code

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2013-4211?

It affects 1 product.


Products: Openx Openx.

## How do I fix CVE-2013-4211?

No fix has been published for CVE-2013-4211 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-4211 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2013-4211 exists.

Public exploit code:

- OpenX Backdoor PHP Code Execution (metasploit)
- OpenX - Backdoor PHP Code Execution (Metasploit) (exploitdb)

## Other vulnerabilities in OpenX Ad Server

- [CVE-2013-7149](https://insights.sbomify.com/CVE-2013-7149/): SQL injection in n/a (high 7.5)
- [CVE-2012-4990](https://insights.sbomify.com/CVE-2012-4990/): SQL injection in n/a (high 7.5)
- [CVE-2009-4830](https://insights.sbomify.com/CVE-2009-4830/): Auth bypass in n/a (high 7.5)
- [CVE-2008-6163](https://insights.sbomify.com/CVE-2008-6163/): SQL injection in n/a (high 7.5)
- [CVE-2009-0291](https://insights.sbomify.com/CVE-2009-0291/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-4211 and fix it if it is affected.

What it is: CVE-2013-4211 is a critical code injection vulnerability in OpenX Ad Server, published on 14 Feb 2020. 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-2013-4211 exists.

Affected product: OpenX Ad Server. 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-2013-4211/ (Markdown: https://insights.sbomify.com/CVE-2013-4211/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-4211
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-4211
- OSV: https://osv.dev/vulnerability/CVE-2013-4211

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-4211/
Summaries are generated and may contain mistakes; the official description above is the record.