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.bleepingcomputer.com/news/security/cisa-flags-wing-ftp-server-flaw-as-actively-exploited-in-attacks/
https://www.bleepingcomputer.com/news/security/hackers-are-exploiting-critical-rce-flaw-in-wing-ftp-server/
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
Source: Mitre, NVD
Published: 2025-07-10
Updated: 2025-07-17
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00027