XML-RPC is a specification that enables communication between WordPress WordPress does more than 38.8% of all websites on the internet. Yes - more than one in four websites you visit is likely powered by WordPress. • WordPress.org , often as self-hosted WordPress is the free open source WordPress software that you can install on your own web host to create a 100% custom website.• WordPress.com is a for-profit, paid... and other systems. This was achieved by standardizing this communication using HTTP as the transport mechanism and XML as the encoding mechanism.
XML-RPC is largely out of date and should be disabled:
https://noprob.olbricht.it/knowhow/deaktivieren-der-xmlrpc-schnittstelle/
Source: https: //bestwebsoft.com/what-is-xml-rpc/
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