Search Analytics for WP < 1.5.0 - Cross-Site Request Forgery

Description

The Search Analytics for WP plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.4.16. This is due to missing or incorrect nonce validation on the `process_bulk_action()` function of `MWTSA_Stats_Table`. This makes it possible for unauthenticated attackers to delete arbitrary search-term records, including all associated search-history rows, via a forged request granted they can trick a user with access to the plugin's "Search Analytics" dashboard page (Administrator by default) into performing an action such as clicking on a link.