# CVE-2018-9206: Unrestricted Upload of File with Dangerous Type in blueimp-file-upload

> Unauthenticated attackers can upload arbitrary files to execute code on systems using the vulnerable jQuery File Upload library.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Oct 2018
- **Updated:** 12 Aug 2026
- **Also known as:** CVE-2025-63994, DEBIAN-CVE-2018-9206, GHSA-4cj8-g9cp-v5wr, UBUNTU-CVE-2018-9206

## What is CVE-2018-9206?

CVE-2018-9206 is a critical vulnerability in Blueimp jQuery-File-Upload, published on 11 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unauthenticated arbitrary file upload vulnerability in Blueimp jQuery-File-Upload <= v9.22.0

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2018-9206?

2 open source packages ship an affected version, including blueimp-file-upload. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `blueimp-file-upload` | npm | All versions | 9.22.1 |
| `blueimp-file-upload` | npm | All versions | 9.22.1 |

Products: Jquery File Upload Project Jquery File Upload.

## How do I fix CVE-2018-9206?

Upgrade blueimp-file-upload to 9.22.1 or later.

## Is CVE-2018-9206 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-9206 exists.

Public exploit code:

- A weaponized version of CVE-2018-9206 (github_poc): https://github.com/Stahlz/JQShell
- A Python PoC for CVE-2018-9206 (github_poc): https://github.com/Den1al/CVE-2018-9206
- https://github.com/flame-11/CVE-2018-9206-jquery-file-upload (github_poc): https://github.com/flame-11/CVE-2018-9206-jquery-file-upload
- blueimp's jQuery (Arbitrary) File Upload (metasploit)
- jQuery-File-Upload 9.22.0 - Arbitrary File Upload (exploitdb)
- blueimp's jQuery 9.22.0 - (Arbitrary) File Upload (Metasploit) (exploitdb)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9206 and fix it if it is affected.

What it is: CVE-2018-9206 is a critical vulnerability in Blueimp jQuery-File-Upload, published on 11 Oct 2018. 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-2018-9206 exists.

Affected packages and fixed versions:
- blueimp-file-upload (npm): affected all versions; fixed in 9.22.1
- blueimp-file-upload (npm): affected all versions; fixed in 9.22.1

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-2018-9206/ (Markdown: https://insights.sbomify.com/CVE-2018-9206/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9206
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9206
- OSV: https://osv.dev/vulnerability/CVE-2018-9206

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9206/
Summaries are generated and may contain mistakes; the official description above is the record.