In Progress Ipswitch WhatsUp Gold 16.1 through 21.1.1, and 22.0.0, it is possible for an unauthenticated attacker to obtain the WhatsUp Gold installation serial number.
In Progress Ipswitch WhatsUp Gold 17.0.0 through 21.1.1, and 22.0.0, it is possible for an authenticated user to invoke an API transaction that would allow them to read sensitive operating-system attributes from a host that is accessible by the WhatsUp Gold system.