Sooraj V Nair
Published on
01 Oct 2021

The open-source FTP server program ProFTPd was exposed to an unauthorized file copying vulnerability, which is caused by the mod_copy module in ProFTPd. The mod_copy module of ProFTPd was originally used for file copy operations, but in the vulnerable version, the relevant command operations of the mod_copy module did not set access authorization verification, resulting in any client being able to copy any file in the system through a specific command.


Attackers can use this vulnerability to obtain system-sensitive files, obtain server permissions, and so on.

Mitigation / Precaution

In order to patch this vulnerability, we suggest you update ProFTPd to the latest version.

Automated human-like penetration testing for your web apps & APIs
Teams using Beagle Security are set up in minutes, embrace release-based CI/CD security testing and save up to 65% with timely remediation of vulnerabilities. Sign up for a free account to see what it can do for you.

Written by
Sooraj V Nair
Sooraj V Nair
Cyber Security Engineer
Find website security issues in a flash
Improve your website's security posture with proactive vulnerability detection.
Free website security assessment