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.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-47813 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-47813 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-47813 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 POST requests to /loginok.html with a specially crafted overlong UID cookie, causing the server to disclose internal filesystem paths in error messages.