admin/includes/class.import.snippet.php in the "Woody ad snippets" plugin before 2.2.5 for WordPress allows unauthenticated options import, as demonstrated by storing an XSS payload for remote code execution.
The simple-301-redirects-addon-bulk-uploader plugin through 1.2.4 for WordPress has no requirement for authentication for action=bulk301export or action=bulk301clearlist.
admin/includes/class.actions.snippet.php in the "Woody ad snippets" plugin through 2.2.5 for WordPress allows wp-admin/admin-post.php?action=close&post= deletion.