A script that exploits the CVE-2011-2523 vulnerability in vsftpd.
git clone https://github.com/chleba124/vsftpd-exploit.git
cd vsftpd-exploit
python -m pip install -r requirements.txt
py main.py
Yes it is and it is open source so you can read the code.
It connects to the vsptfd ftp server and bypasses the password.
No, you can only use it on Windows.