ZOHO ManageEngine ADSelfService Plus before 4.5 Build 4500 allows remote attackers to reset user passwords, and consequently obtain access to arbitrary user accounts, by providing a user id to accounts/ValidateUser, and then providing a new password to accounts/ResetResult.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.