The Ivory Search WordPress plugin before 5.5.10 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed
The Ivory Search – WordPress Search Plugin plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 5.5.6 via the ajax_load_posts function. This makes it possible for unauthenticated attackers to extract text data from password-protected posts using the boolean-based attack on the AJAX search form
The Ivory Search WordPress plugin before 5.4.1 does not escape some of the Form settings, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
The Search Forms page of the Ivory Search WordPress lugin before 4.6.1 did not properly sanitise the tab parameter before output it in the page, leading to a reflected Cross-Site Scripting issue when opening a malicious crafted link as a high privilege user. Knowledge of a form id is required to conduct the attack.