WordPress Pie Register plugin authorization issue vulnerability

WordPress is a set of blogging platforms developed by the Wordpress Foundation using the PHP language. The WordPress Pie Register plugin is vulnerable to an authorization issue in versions prior to 3.7.1.6. The vulnerability stems from a flaw in the social login implementation of the Pie Register plugin, which can be exploited by an unauthenticated attacker who knows their user ID or username to log in as any user on the site.