Wing FTP Server before 7.4.4 does not properly validate and sanitize the url parameter of the downloadpass.html endpoint, allowing injection of an arbitrary link. If a user clicks a crafted link, this discloses a cleartext password to the attacker.
https://www.wftpserver.com/wftpserver.htm
https://www.rcesecurity.com/2025/06/what-the-null-wing-ftp-server-rce-cve-2025-47812/
https://github.com/MrTuxracer/advisories/blob/master/CVEs/CVE-2025-27889.txt