Por favor actualizar a la versión 1.35.1 mínimo. Según Wordfence hasta la 1.35.0 tiene una vulnerabilidad.
“The YITH WooCommerce Tab Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via settings in all versions up to, and including, 1.35.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.”