# CVE-2009-4623: Code injection in n/a

> Remote attackers can execute arbitrary PHP code via a URL in the ACS_path parameter, potentially compromising the web server.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jan 2010
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-6g86-c9gm-gqg5

## What is CVE-2009-4623?

CVE-2009-4623 is a high-severity code injection vulnerability in n/a, published on 18 Jan 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple PHP remote file inclusion vulnerabilities in Advanced Comment System 1.0 allow remote attackers to execute arbitrary PHP code via a URL in the ACS_path parameter to (1) index.php and (2) admin.php in advanced_comment_system/. NOTE: this might only be a vulnerability when the administrator has not followed installation instructions in install.php. NOTE: this might be the same as CVE-2020-35598.

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

## Which versions are affected by CVE-2009-4623?

It affects 1 product.


Products: Plohni Advanced Comment System.

## How do I fix CVE-2009-4623?

No fix has been published for CVE-2009-4623 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-4623 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4623 exists.

Public exploit code:

- https://github.com/kernel-cyber/CVE-2009-4623 (github_poc): https://github.com/kernel-cyber/CVE-2009-4623
- Advanced Comment System 1.0 - Multiple Remote File Inclusions (exploitdb)
- Advanced Comment System 1.0 - Remote Command Execution (RCE)  (github_poc): https://github.com/hupe1980/CVE-2009-4623
- Remote shell on CVE-2009-4623 (github_poc): https://github.com/sammonsempes/CVE-2009-4623

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4623 and fix it if it is affected.

What it is: CVE-2009-4623 is a high-severity code injection vulnerability in n/a, published on 18 Jan 2010. 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-2009-4623 exists.

Affected product: n/a. 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-2009-4623/ (Markdown: https://insights.sbomify.com/CVE-2009-4623/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4623
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4623
- OSV: https://osv.dev/vulnerability/CVE-2009-4623

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4623/
Summaries are generated and may contain mistakes; the official description above is the record.