Cross-site request forgery (CSRF) vulnerability in Pligg CMS 2.0.2 allows remote attackers to hijack the authentication of administrators for requests that add an administrator via a request to admin/admin_users.php.
https://www.exploit-db.com/exploits/37955/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-6593
http://packetstormsecurity.com/files/133299/Pligg-CMS-2.0.2-Cross-Site-Request-Forgery.html