Version 2.0.8 is frequently referenced in VulnHub CTF writeups as a service running on target machines like "Stapler," where the goal is usually to find misconfigurations rather than a direct code-execution exploit in that specific version. PwnHouse/OSVDB-73573/README.md at master - GitHub
: Any password can be used; the only requirement is the specific character sequence in the username. vsftpd 208 exploit github link
The server (if backdoored) would instantly open a listener on TCP port . Connecting to that port with netcat would give a root shell immediately — no password required. Version 2
In July 2011, the source code for vsftpd 2.3.4 was briefly replaced with a version containing a malicious backdoor. This wasn't an accidental bug; it was an intentional injection that allowed attackers to gain root access with a simple string. How It Works Connecting to that port with netcat would give