The WordPress plugin, Email Subscribers & Newsletters, before 4.2.3 had a flaw that allowed for unauthenticated option creation. In order to exploit this vulnerability, an attacker would need to send a /wp-admin/admin-post.php?es_skip=1&option_name= request.
- https://wpvulndb.com/vulnerabilities/9946
- https://github.com/20142995/nuclei-templates