Report for IP: 51.91.54.91

This IP targeted xmlrpc.php, a legacy WordPress endpoint that has been abused for brute-force authentication attacks, credential stuffing, and DDoS amplification. Any direct access to xmlrpc.php is an attack or reconnaissance attempt; modern WordPress sites should disable it entirely.

This IP probed the WordPress ?author= parameter to enumerate valid usernames (e.g. ?author=1, ?author=2). Harvested usernames are then fed into credential stuffing or password brute-force attacks. This is purely reconnaissance — there is no legitimate reason to systematically probe author IDs.