accounts/ValidateAnswers in the security-questions implementation in ZOHO ManageEngine ADSelfService Plus before 4.5 Build 4500 makes it easier for remote attackers to reset user passwords, and consequently obtain access to arbitrary user accounts, via a modified (1) Hide_Captcha or (2) quesList parameter in a validateAll action.
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.