# CVE-2004-0820: Cross-site scripting in n/a

> Remote attackers can execute arbitrary script in the Local computer zone via malicious HTML in skin files, requiring user interaction to open the skin.

- **Severity:** Medium 4.6 (`AV:L/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 2 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-q427-h43h-5g3g

## What is CVE-2004-0820?

CVE-2004-0820 is a medium-severity cross-site scripting vulnerability in Nullsoft Winamp, published on 2 Sep 2004. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Winamp before 5.0.4 allows remote attackers to execute arbitrary script in the Local computer zone via script in HTML files that are referenced from XML files contained in a .wsz skin file.

## Which versions are affected by CVE-2004-0820?

It affects 1 product.


Products: Nullsoft Winamp.

## How do I fix CVE-2004-0820?

No fix has been published for CVE-2004-0820 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0820 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2004-0820 exists.

Public exploit code:

- Winamp 5.04 - '.wsz' Skin File Remote Code Execution (exploitdb)

## Other vulnerabilities in Nullsoft Winamp

- [CVE-2011-4857](https://insights.sbomify.com/CVE-2011-4857/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-0263](https://insights.sbomify.com/CVE-2009-0263/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-1119](https://insights.sbomify.com/CVE-2004-1119/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3834](https://insights.sbomify.com/CVE-2011-3834/): Integer overflow in n/a (critical 9.3)
- [CVE-2010-2586](https://insights.sbomify.com/CVE-2010-2586/): Integer overflow in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0820 and fix it if it is affected.

What it is: CVE-2004-0820 is a medium-severity cross-site scripting vulnerability in Nullsoft Winamp, published on 2 Sep 2004. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2004-0820 exists.

Affected product: Nullsoft Winamp. 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-2004-0820/ (Markdown: https://insights.sbomify.com/CVE-2004-0820/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0820
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0820
- OSV: https://osv.dev/vulnerability/CVE-2004-0820

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0820/
Summaries are generated and may contain mistakes; the official description above is the record.