Ticket #49639: 49639.patch

src/wp-includes/user.php

@@ -1776 +1776 @@
         } else {
                 $update = false;
                 // Hash the password.
+                $pre_hash_password = apply_filters( 'pre_hash_password', $user_pass );
                 $user_pass = wp_hash_password( $userdata['user_pass'] );
         }