Wing FTP Server - RCE (CVE-2025-47812)
311Exploiting IPs reported
In Wing FTP Server before 7.4.4. the user and admin web interfaces mishandle '\0' bytes, ultimately allowing injection of arbitrary Lua code into user session files. This can be used to execute arbitrary system commands with the privileges of the FTP service (root or SYSTEM by default). This is thus a remote code execution vulnerability that guarantees a total server compromise. This is also exploitable via anonymous FTP accounts.
CrowdSec analysis
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.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2025-47812 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. 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.
Exploitation
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Blocklist
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