The Registration Forms User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes WordPress plugin before 3.1.7.6 has a flaw in the social login implementation, allowing unauthenticated attacker to login as any user on the site by only knowing their user ID or username
View the template here CVE-2021-24647.yaml
References:
https://github.com/RandomRobbieBF/CVE-2021-24647