# CVE-2024-43800: serve-static affected by template injection that can lead to XSS

> An attacker can execute untrusted code via template injection in serve-static, potentially leading to XSS, affecting Node.js applications using this library.

- **Severity:** Medium 5.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **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:** Yes
- **Published:** 10 Sep 2024
- **Updated:** 10 Sep 2024
- **Also known as:** AZL-49094, AZL-49147, AZL-49155, CLSA-2026-1784856192, CLSA-2026-1792490203, DEBIAN-CVE-2024-43800, GHSA-cm22-4g7w-348p, MINI-59gg-4g97-5686, ROOT-APP-NPM-CVE-2024-43800, UBUNTU-CVE-2024-43800

## What is CVE-2024-43800?

CVE-2024-43800 is a medium-severity cross-site scripting vulnerability in expressjs serve-static, published on 10 Sep 2024. 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

serve-static serves static files. serve-static passes untrusted user input - even after sanitizing it - to redirect() may execute untrusted code. This issue is patched in serve-static 1.16.0.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2024-43800?

4 open source packages ship an affected version, including serve-static. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `serve-static` | npm | All versions | 1.16.0 |
| `serve-static` | npm | All versions | 1.16.0 |
| `serve-static` | npm | From 2.0.0 | 2.1.0 |
| `serve-static` | npm | From 2.0.0 | 2.1.0 |

Products: Openjsf Serve-Static.

## How do I fix CVE-2024-43800?

Upgrade serve-static to a fixed version for your release line: 1.16.0 or 2.1.0.

## Is CVE-2024-43800 being exploited?

There is no known exploitation of CVE-2024-43800 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43800 and fix it if it is affected.

What it is: CVE-2024-43800 is a medium-severity cross-site scripting vulnerability in expressjs serve-static, published on 10 Sep 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-43800 in the wild and no public exploit code.

Affected packages and fixed versions:
- serve-static (npm): affected all versions; fixed in 1.16.0
- serve-static (npm): affected all versions; fixed in 1.16.0
- serve-static (npm): affected from 2.0.0; fixed in 2.1.0
- serve-static (npm): affected from 2.0.0; fixed in 2.1.0

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-2024-43800/ (Markdown: https://insights.sbomify.com/CVE-2024-43800/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43800
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43800
- OSV: https://osv.dev/vulnerability/CVE-2024-43800

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43800/
Summaries are generated and may contain mistakes; the official description above is the record.