# CVE-2011-4343: Apache MyFaces Vulnerable to EL Injection

> Remote attackers can inject EL expressions in Apache MyFaces Core, leading to code execution and information disclosure.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 8 Aug 2017
- **Updated:** 7 Aug 2024
- **Also known as:** CVE-2011-4359, GHSA-jq6g-p65r-44xr

## What is CVE-2011-4343?

CVE-2011-4343 is a high-severity code injection vulnerability in n/a, published on 8 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Information disclosure vulnerability in Apache MyFaces Core 2.0.1 through 2.0.10 and 2.1.0 through 2.1.4 allows remote attackers to inject EL expressions via crafted parameters.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2011-4343?

4 open source packages ship an affected version, including org.apache.myfaces.core:myfaces-core-module. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.apache.myfaces.core:myfaces-core-module` | Maven | From 2.0.1 | 2.0.11 |
| `org.apache.myfaces.core:myfaces-core-module` | Maven | From 2.0.1 | 2.0.11 |
| `org.apache.myfaces.core:myfaces-core-module` | Maven | From 2.1.0 | 2.1.5 |
| `org.apache.myfaces.core:myfaces-core-module` | Maven | From 2.1.0 | 2.1.5 |

Products: Apache Myfaces.

## How do I fix CVE-2011-4343?

Upgrade org.apache.myfaces.core:myfaces-core-module to a fixed version for your release line: 2.0.11 or 2.1.5.

## Is CVE-2011-4343 being exploited?

There is no known exploitation of CVE-2011-4343 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-26296](https://insights.sbomify.com/CVE-2021-26296/): Cross-Site Request Forgery (CSRF) vulnerability in Apache MyFaces (high 7.5)
- [CVE-2011-4367](https://insights.sbomify.com/CVE-2011-4367/): Apache MyFaces Vulnerable to Path Traversal (medium 5.0)
- [CVE-2010-2057](https://insights.sbomify.com/CVE-2010-2057/): Improper Authentication in Apache MyFaces (medium 5.0)
- [CVE-2010-2086](https://insights.sbomify.com/CVE-2010-2086/): Apache MyFaces Cross-site Scripting vulnerability (medium 4.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-4343 and fix it if it is affected.

What it is: CVE-2011-4343 is a high-severity code injection vulnerability in n/a, published on 8 Aug 2017. 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-2011-4343 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.apache.myfaces.core:myfaces-core-module (Maven): affected from 2.0.1; fixed in 2.0.11
- org.apache.myfaces.core:myfaces-core-module (Maven): affected from 2.0.1; fixed in 2.0.11
- org.apache.myfaces.core:myfaces-core-module (Maven): affected from 2.1.0; fixed in 2.1.5
- org.apache.myfaces.core:myfaces-core-module (Maven): affected from 2.1.0; fixed in 2.1.5

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-2011-4343/ (Markdown: https://insights.sbomify.com/CVE-2011-4343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-4343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-4343
- OSV: https://osv.dev/vulnerability/CVE-2011-4343

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From sbomify Insights: https://insights.sbomify.com/CVE-2011-4343/
Summaries are generated and may contain mistakes; the official description above is the record.