Wing FTP Server - Information Disclosure (CVE-2025-47813)

CVE-2025-47813 is an information disclosure vulnerability in Wing FTP Server prior to version 7.4.4, where the loginok.html page reveals the full local installation path when a long UID cookie value is used. Attackers could leverage this information to facilitate further attacks, such as path traversal or targeted exploitation based on the server's directory structure.

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-2025-47813 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-47813 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers exploit this vulnerability by sending POST requests to /loginok.html with a specially crafted overlong UID cookie, causing the server to disclose internal filesystem paths in error messages.