ManageEngine ADSelfService Plus below build 6116 contains an observable response discrepancy in the UMCP operation of the ChangePasswordAPI. This allows an unauthenticated remote attacker to determine whether a Windows domain user exists.
https://www.tenable.com/security/research/tra-2021-52
Source: MITRE
Published: 2022-01-03
Updated: 2022-01-04