The User Verification by PickPlugins plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 2.0.46. This is due to the use of a loose PHP comparison operator to validate OTP codes in the "userverificationformwrapprocessotpLogin" function. This makes it possible for unauthenticated attackers to log in as any user with a verified email address, such as an administrator, by submitting a "true" OTP value.

The User Verification WordPress plugin before 1.0.94 was affected by an Auth Bypass security vulnerability. To bypass authentication, we only need to know the user’s username. Depending on whose username we know, which can be easily queried because it is usually public data, we may even be given an administrative role on the website.

Weak Authentication vulnerability in PickPlugins User Verification user-verification allows Authentication Abuse.This issue affects User Verification: from n/a through <= 2.0.45.