Threat database

The Relevanssi – A Better Search WordPress plugin is affected by a stored cross-site scripting (XSS) vulnerability in all versions up to and including 4.28.3. This vulnerability arises from insufficient input sanitization and output escaping of comment content. Exploitation requires the administrator to have configured a non-empty "Allowable tags in excerpts" setting with tags that prefix the injected tag name. An unauthenticated attacker can inject malicious scripts that execute when users access the affected pages.

The Relevanssi – A Better Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.28.1 via the 's', 'post_types', and 'orderby' request parameters. This is due to insufficient input sanitization and output escaping in the relevanssi_debug_array() function in lib/debug.php, which dumps user-supplied query variables through print_r() inside a <pre> block without HTML escaping. The debug path is enabled by supplying the relevanssi_debug=on request parameter when the administrator has previously enabled the 'Debugging mode' setting; the gate itself is a configuration check with no capability, nonce, or logged-in check (the vendor explicitly suppresses nonce verification on that line). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.

The Relevanssi Live Ajax Search plugin for WordPress is vulnerable to argument injection in all versions up to, and including, 2.4. This is due to insufficient validation of input supplied via POST data in the 'search' function. This makes it possible for unauthenticated attackers to inject arbitrary arguments into a WP_Query query and potentially expose sensitive information such as attachments or private posts.