source: https://www.securityfocus.com/bid/68558/info
ENL Newsletter plugin for WordPress is prone to an SQL-injection vulnerability because it fails to sufficiently sanitize user-supplied input.
An attacker can exploit this issue to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.
ENL Newsletter 1.0.1 is vulnerable; other versions may also be affected.
http://www.example.com/wp-admin/admin.php?page=enl-add-new&id=2 union select 1,@@version,3,user(),database(),6,7,8,9,0,1