Adam walked through the XML-RPC exploit, what it means and how it can affect your site. He then gave three easy ways that you can fix this problem on your site if it hasn’t been done already.
The XMLRPC exploit is one of the biggest security issues facing WordPress today. I’ll show you some simple fixes to protect your site.
More info: http://www.incapsula.com/blog/wordpress-security-alert-pingback-ddos.html
Check out Adam’s notes on how easy it is to fix this vulnerability below: