XMLRPC.php is php file included with wordpress installation, it allows posting of content remotely through supported web blogs to wordpress blog, it provide many other features as well having many pros and cons. As far as web site security is concerned XMLRPC.php file is famous among hackers and attackers.
Most of the wordpress blogs get hits by attackers on XMLRPC.php usually called DDOS attacks. During the attack XMLRPC.php gets many requests and that makes web site goes down with excessive usage of allocated resources. Some web hosting providers suspend those accounts for high resource usage issues. Read More