The Profile Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's usermeta and compare shortcodes in all versions up to, and including, 3.13.8 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

it's possible for an attacker to gain administrative access without having any kind of account on the targeted site and perform unauthorized actions. This is due to improper logic flow on the user registration process.

The User Profile Builder WordPress plugin before 3.12.2 does not sanitise and escape some parameters before outputting its content on the admin area, which allows Admin+ users to perform Cross-Site Scripting attacks.