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CVE-2025-34299 is a critical pre-authentication vulnerability in Monsta FTP 2.11 and earlier that allows an unauthenticated attacker to cause the application to download attacker-controlled content from a malicious FTP or SFTP server and write it to an arbitrary location on the target server. The issue is described as an unauthenticated arbitrary file upload or arbitrary file write primitive that can be turned into remote code execution by supplying a specially crafted file and leveraging Monsta FTP’s server-side file handling behavior. The vulnerable condition enables Monsta FTP to be abused as a write gadget against the underlying host, allowing attacker-controlled content to be placed where it can later be executed by the web stack or another interpreter present on the system.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (5 hidden).
This repository contains a working exploit for Monsta FTP CVE-2025-34299, a remote code execution vulnerability affecting Monsta FTP version 2.10.4. The exploit is implemented in Python (exploit.py) and leverages the vulnerable 'downloadFile' API endpoint to upload a malicious PHP reverse shell payload to the target server. The exploit script sets up a malicious FTP server (using pyftpdlib) that serves the payload, then instructs the target Monsta FTP instance to download the payload via the API. Once uploaded, the exploit triggers the payload by making an HTTP request, resulting in a reverse shell connection back to the attacker's machine (using pwntools for interactivity). The payload is designed to self-delete after execution. The repository also includes a Docker-based lab setup (lab/Dockerfile, lab/docker-compose.yml) for local testing, which automatically downloads and installs Monsta FTP 2.10.4. The README provides detailed setup and usage instructions, including endpoint URLs and default parameters. The exploit is operational and provides a real reverse shell if the target is vulnerable and reachable.
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49 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously disclosed unauthenticated arbitrary-file-write-to-RCE vulnerability in Monsta FTP, mentioned as background and comparison to the newly disclosed SSRF issue.
A previously disclosed unauthenticated arbitrary-file-write-to-RCE vulnerability in Monsta FTP, mentioned as prior related research and already patched.
A remote code execution vulnerability in Monsta FTP's downloadFile functionality, referenced as a Metasploit module PR.
A critical pre-authentication remote code execution vulnerability in the Monsta FTP web-based file management application that can be weaponized to make the server download and write a malicious payload, enabling full server/hosting environment compromise.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.