The WordPress WP-Advanced-Search WordPress plugin before 3.3.9.3 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).
The WP-Advanced-Search WordPress plugin before 3.3.9.2 does not sanitize and escape the t parameter before using it in a SQL statement, allowing unauthenticated users to perform SQL injection attacks
The Import feature in the wp-advanced-search plugin 3.3.6 for WordPress is vulnerable to authenticated SQL injection via an uploaded .sql file. An attacker can use this to execute SQL commands without any validation.