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

Q: 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.

Q: Is CVE-2025-34299 being exploited?

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

Q: 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.

Critical 9.3 Published 7 Nov 2025 Updated 14 May 2026

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

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

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

Which versions are affected by CVE-2025-34299?

It affects 1 product.

Products include 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: 1 Metasploit module, 1 Nuclei template and 3 proofs of concept on GitHub.

Sources

Also known as GHSA-42m5-3r2p-wr92.