XML-RPC, or how to go off on wild goose chases
XML-RPC, in case you aren’t living in the early 2000s, is a remote procedural call (get it?) that encodes its HTTP returns in XML. It has been largely replaced with RESTful APIs, but it still exists. The two places I’m personally aware of are rtorrent, and Wordpress. The former I lived with, mainly because nothing was exposed to the internet; the latter I wasn’t aware of until today. I thought I had been the victim of a DoS attack using it as a vector but (SPOILER) I don’t believe that to be the case....