The Ivory Search – WordPress Search Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 's' parameter in all versions up to, and including, 5.5.18 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the targeted search form has the 'Highlight Search Terms' option enabled by an administrator, and that the malicious search query returns at least one post result.

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 unfilteredhtml is disallowed

The Ivory Search – WordPress Search Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxcreateindex() function in all versions up to, and including, 5.5.5. This makes it possible for authenticated attackers, with subscriber-level access and above, to trigger index creation.