Is XML-RPC safe

Is XML-RPC safe

This is my first question here, so I hope it matches the requirements.
I have a set of web applications on servers, and an end-user has asked us
to enable XML-RPC. The "remote procedure call" portion of XML-RPC scares
me a bit. Are my concerns valid (i.e. is it safe to enable/use XML-RPC)?
From my searches, I can only find information specific to Wordpress
(apparently they deemed XML-RPC safe enough to enable it by default since
their version 3.5).
Thanks!