The Popup Builder WordPress plugin before 4.2.3 does not prevent simple visitors from updating existing popups, and injecting raw JavaScript in them, which could lead to Stored XSS attacks.

The Popup Builder WordPress plugin before 4.2.0 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).

Cross-Site Request Forgery (CSRF) vulnerability in Sygnoos Popup Builder plugin <= 4.1.11 at WordPress allows an attacker to update plugin settings.

Cross-Site Request Forgery (CSRF) vulnerability in Sygnoos Popup Builder plugin <= 4.1.0 at WordPress leading to popup status change.

The Popup Builder WordPress plugin before 4.1.11 does not escape and sanitize some settings, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfiltred_html is disallowed

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

The "All Subscribers" setting page of Popup Builder was vulnerable to reflected Cross-Site Scripting.

A SQL injection vulnerability exists in the Sygnoos Popup Builder plugin before 3.45 for WordPress. Successful exploitation of this vulnerability would allow a remote attacker to execute arbitrary SQL commands on the affected system via com/libs/Table.php because Subscribers Table ordering is mishandled.