WordPress version 3.5 has the XML-RPC interface enabled by default. This tool uses the Pingback API to perform portscanning.
You can download it from the following link: https://packetstormsecurity.com/files/download/118859/WordpressPingbackPortScanner-master.zip
Source: https://packetstormsecurity.com/files/118859/WordPress-Pingback-Port-Scanner.html