Wing FTP Server - RCE (CVE-2025-47812)

CVE-2025-47812 is a critical remote code execution vulnerability in Wing FTP Server prior to version 7.4.4, where improper handling of null bytes in the web interfaces allows attackers to inject arbitrary Lua code into session files. Exploitation of this flaw can lead to execution of system commands with root or SYSTEM privileges, resulting in complete server compromise, and can even be triggered via anonymous FTP accounts.

CrowdSec has been tracking this vulnerability and its exploits since 16th of July 2025.

CrowdSec network data shows that most actors exploiting CVE-2025-47812 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-47812 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-47812 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit this vulnerability by sending a POST request to /loginok.html with a maliciously crafted username, enabling remote code execution on vulnerable Wing FTP Server instances.