# CVE-2012-2751: Security feature bypass in n/a

> Remote attackers can bypass ModSecurity filtering rules when used with PHP, potentially enabling subsequent attacks like XSS.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Jul 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-2751, DSA-2506-1, GHSA-38m7-p7j8-c694

## What is CVE-2012-2751?

CVE-2012-2751 is a medium-severity vulnerability in Debian Debian Linux, published on 22 Jul 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ModSecurity before 2.6.6, when used with PHP, does not properly handle single quotes not at the beginning of a request parameter value in the Content-Disposition field of a request with a multipart/form-data Content-Type header, which allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-5031.

## Which versions are affected by CVE-2012-2751?

It affects 4 products.


Products: Debian Debian Linux, Opensuse Opensuse, Oracle Http Server, Trustwave Modsecurity.

## How do I fix CVE-2012-2751?

Upgrade to a fixed version.

## Is CVE-2012-2751 being exploited?

There is no known exploitation of CVE-2012-2751 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-2751 and fix it if it is affected.

What it is: CVE-2012-2751 is a medium-severity vulnerability in Debian Debian Linux, published on 22 Jul 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2012-2751 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2012-2751/ (Markdown: https://insights.sbomify.com/CVE-2012-2751/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-2751
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-2751
- OSV: https://osv.dev/vulnerability/CVE-2012-2751

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-2751/
Summaries are generated and may contain mistakes; the official description above is the record.