Ticket #49521: 49521.2.patch

src/wp-login.php

@@ -387 +387 @@
          */
         do_action( 'lostpassword_post', $errors, $user_data );
 
+        /**
+         * Filters the errors encountered from a password reset request.
+         *
+         * @since 5.4.0
+         *
+         * @param WP_Error       $errors     A WP_Error object containing any errors encountered.
+         *
+         * @param WP_User|false  $user_data  WP_User object if found, false if the user does not exist.
+         */
+        $errors = apply_filters( 'lostpassword_errors', $errors, $user_data );
+
         if ( $errors->has_errors() ) {
                 return $errors;
         }