A vulnerability had been discovered in WinNMP 19.02 consisting of an XSS attack via index page in from, subject, text and hash parameters. This vulnerability could allow a remote user to send a specially crafted query to an authenticated user and steal their session details.
Solution:
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.