GTSolutions/Pie-Register

An authentication bypass vulnerability exists in the WordPress Pie Register plugin ≤ 3.7.1.4 that allows unauthenticated attackers to impersonate arbitrary users by submitting a crafted POST request to the login endpoint. By setting social_site=true and manipulating the user_id_social_site parameter, an attacker can generate a valid WordPress session cookie for any user ID, including administrators. Once authenticated, the attacker may exploit plugin upload functionality to install a malicious plugin containing arbitrary PHP code, resulting in remote code execution on the underlying server.

Multiple SQL injection vulnerabilities in pie-register/pie-register.php in the Pie Register plugin before 2.0.19 for WordPress allow remote administrators to execute arbitrary SQL commands via the (1) select_invitaion_code_bulk_option or (2) invi_del_id parameter in the pie-invitation-codes page to wp-admin/admin.php.

Cross-site scripting (XSS) vulnerability in pie-register/pie-register.php in the Pie Register plugin before 2.0.19 for WordPress allows remote attackers to inject arbitrary web script or HTML via the invitaion_code parameter in a pie-register page to the default URI.