The Popup Builder WordPress plugin before 4.1.1 does not sanitise and escape the sgpb-subscription-popup-id parameter before using it in a SQL statement in the All Subscribers admin dashboard, leading to a SQL injection, which could also be used to perform Reflected Cross-Site Scripting attack against a logged in admin opening a malicious link
The Popup Builder WordPress plugin before 4.0.7 does not validate and properly escape the orderby and order parameters before using them in a SQL statement in the admin dashboard, which could allow high privilege users to perform SQL injection
The Popup Builder WordPress plugin before 4.0.7 does not validate and sanitise the sgpb_type parameter before using it in a require statement, leading to a Local File Inclusion issue. Furthermore, since the beginning of the string can be controlled, the issue can lead to RCE vulnerability via wrappers such as PHAR