CVE-2025-34299 Scanner

Monsta FTP is a popular web-based file manager that provides users with FTP access to their files on a remote server through a web browser. It's often used by web developers, system administrators, and users who need an alternative to command line FTP clients. This software aims to make file transfers more user-friendly and accessible. It is frequently employed to manage files of hosted websites, check server resources, and configure server settings. Monsta FTP is appreciated for its straightforward and simple interface which allows users to perform complex FTP operations with ease. However, due to its extensive features, it has been targeted by attackers aiming to exploit potential vulnerabilities.

The vulnerability present in Monsta FTP allows unauthenticated attackers to upload malicious files with the potential to execute arbitrary code. This issue arises from an unrestricted file upload vulnerability within specific versions of the software. Attackers can exploit this flaw without requiring authentication, leading to the upload of crafted files that execute arbitrary code on the server. Such vulnerabilities pose a significant risk as they can be leveraged with minimal effort by attackers with malicious intent. The vulnerability can compromise the server, exposing it to unauthorized access and control. It's critical for users to be aware of the potential impacts and secure their systems accordingly.

Technical details of this vulnerability include a lack of proper authentication checks in the file upload process, which is a significant security oversight. The vulnerability affects endpoints involving file uploads where crafted HTTP requests can include malicious code. The vulnerability is exacerbated by the design flaw that doesn't validate user inputs thoroughly, allowing requests to bypass intended controls. Attackers can create requests that effectively use Monsta FTP features to upload files that execute on the server. The ability to upload executable scripts can lead to full server compromise if left unaddressed. It is essential for systems running vulnerable versions to apply security patches promptly.

If this vulnerability is successfully exploited, it can lead to severe repercussions including unauthorized server control, data theft, and disruption of services. The attacker could potentially gain administrative privileges on the server, modify existing files, and install malware. Exploiting this vulnerability may result in significant data loss and service outages. This could critically impact an organization's operations, especially if the compromised server handles sensitive data. Additionally, the vulnerability can serve as a gateway for further attacks on interconnected network resources. Organizations must assess the severity of this risk and implement necessary security measures immediately.

REFERENCES

• https://labs.watchtowr.com/whats-that-coming-over-the-hill-monsta-ftp-remote-code-execution-cve-2025-34299/
• https://github.com/advisories/GHSA-42m5-3r2p-wr92
• https://nvd.nist.gov/vuln/detail/CVE-2025-34299