ProfilePress < 4.13.2 - Limited Privilege Escalation via 'acceptable_defined_roles'

Description

The ProfilePress plugin for WordPress is vulnerable to limited privilege escalation in versions up to, and including, 4.13.1 via the 'acceptable_defined_roles' function due to incomplete validation on a user controlled key. This can allow unauthenticated attackers to elevate their privileges to a non-administrator role during user-registration.