wpDataTables before 3.4.1 mishandles order direction for server-side tables, aka admin-ajax.php?action=get_wdtable order[0][dir] SQL injection.
https://wpdatatables.com/help/whats-new-changelog/
https://wordpress.org/plugins/wpdatatables/#developers
https://n4nj0.github.io/advisories/wordpress-plugin-wpdatatables-i/