The Ad Inserter for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 2.7.30 via the ai-debug-processing-fe URL parameter. This can allow unauthenticated attackers to extract sensitive data including installed plugins (present and active), active theme, various plugin settings, WordPress version, as well as some server settings such as memory limit, installation paths.
The Ad Inserter WordPress plugin before 2.7.27 unserializes user input provided via the settings, which could allow high privilege users such as admin to perform PHP Object Injection when a suitable gadget is present
The Ad Inserter WordPress plugin before 2.7.10, Ad Inserter Pro WordPress plugin before 2.7.10 do not sanitise and escape the html_element_selection parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting