# CVE-2025-34299: Monsta FTP <= 2.11 Unauthenticated Arbitrary File Upload

> Unauthenticated attackers can upload malicious files via FTP to execute arbitrary code on Monsta FTP servers.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Nov 2025
- **Updated:** 14 May 2026
- **Also known as:** GHSA-42m5-3r2p-wr92

## What is CVE-2025-34299?

CVE-2025-34299 is a critical vulnerability in Monsta FTP, published on 7 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Monsta FTP versions 2.11 and earlier contain a vulnerability that allows unauthenticated arbitrary file uploads. This flaw enables attackers to execute arbitrary code by uploading a specially crafted file from a malicious (S)FTP server.

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

## Which versions are affected by CVE-2025-34299?

It affects 1 product.


Products: Monstaftp Monsta Ftp.

## How do I fix CVE-2025-34299?

No fix has been published for CVE-2025-34299 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34299 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34299 exists.

Public exploit code:

- MonstaFTP Unauthenticated File Upload (github_poc): https://github.com/Chocapikk/CVE-2025-34299
- Monsta FTP downloadFile Remote Code Execution (metasploit)
- Detection for CVE-2025-34299 (github_poc): https://github.com/rxerium/CVE-2025-34299
- Docker test environment for CVE-2025-34299 - Monsta FTP Pre-Auth RCE vulnerability (github_poc): https://github.com/KrE80r/CVE-2025-34299-lab
- Monsta FTP <= 2.11.2 - Unauthenticated Remote Code Execution (nuclei): http/cves/2025/CVE-2025-34299.yaml

## Other vulnerabilities in Monsta FTP

- [CVE-2022-27468](https://insights.sbomify.com/CVE-2022-27468/): File upload in n/a (critical 9.8)
- [CVE-2022-27469](https://insights.sbomify.com/CVE-2022-27469/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2020-14056](https://insights.sbomify.com/CVE-2020-14056/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2020-14057](https://insights.sbomify.com/CVE-2020-14057/): Path traversal in n/a (critical 9.8)
- [CVE-2020-14055](https://insights.sbomify.com/CVE-2020-14055/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34299 and fix it if it is affected.

What it is: CVE-2025-34299 is a critical vulnerability in Monsta FTP, published on 7 Nov 2025. 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-2025-34299 exists.

Affected product: Monsta FTP. 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-2025-34299/ (Markdown: https://insights.sbomify.com/CVE-2025-34299/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34299
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34299
- OSV: https://osv.dev/vulnerability/CVE-2025-34299

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34299/
Summaries are generated and may contain mistakes; the official description above is the record.