Hackers are actively exploiting a critical flaw (CVE-2025-47812) in Wing FTP Server, allowing remote code execution with root/system privileges.
The vulnerability stems from improper handling of null bytes, enabling injection of malicious Lua code into session files.
Even anonymous FTP accounts can be used to trigger code execution with administrative rights on both Linux and Windows systems.
Researchers confirmed active exploitation of the flaw shortly after technical details were made public on June 30, urging users to update to server version 7.4.4 or later.