The miniOrange Social Login and Register (Discord, Google, Twitter, LinkedIn) WordPress plugin before 7.8.0 does not bind the one-time code used by its optional email-verification (Profile Completion) feature to the account it was issued for, allowing unauthenticated attackers to obtain a valid session for any account, including administrators, by requesting a code for an email address they control and replaying it against the victims email address. Exploitation requires the Profile Completion feature to be enabled and social login to be configured.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.