The Product Filter by WBW plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'approveNotice' action in all versions up to, and including, 3.0.0. This makes it possible for unauthenticated attackers to update the plugin's settings.
https://github.com/wpcodefactory/woo-product-filter/commit/313f69908cadc31fa9c1e098ff989dc4f75dfdb5