Command Injection and Remote Code Execution (RCE) vulnerabilities Exploit-DB Key Technical Profile Protocols Supported : FTP, FTPS, SFTP, HTTP, and HTTPS. Administration
| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | "425 Can't open data connection" | Passive mode port range blocked by firewall | Set explicit passive ports (e.g., 50000-50100) in Server Settings → FTP → Passive Ports. | | Web Admin loads slow | IPv6 DNS lookup timeout | Disable IPv6 in Windows registry or bind server to IPv4 only. | | SFTP fails after 30 seconds | Idle timeout cutting SSH session | Increase "Idle Timeout" under Server Settings → SFTP to 600 seconds. | | Lua script "attempt to index a nil value" | Legacy variable naming in 4.3.8 | Use cwd instead of current_folder in pre-events. | wing ftp server 4.3.8
: Metasploit modules and public Exploit-DB scripts often use base64-encoded PowerShell or VBS stagers to establish reverse shells. Version Comparison & Technical Evolution Feature/Aspect Versions <= 4.3.8 Versions > 4.3.8 URL Encoding Standard handling Different encoding logic that breaks some legacy exploits Lua Interpreter Introduced in v3.0.0; fully exploitable via os.execute Present, but often with improved input sanitization Default Privileges Runs as NT AUTHORITY/SYSTEM (Windows) or root (Linux) Same default, but newer patches mitigate the injection path Operational Impact | | SFTP fails after 30 seconds |