diff --git src/wp-includes/general-template.php src/wp-includes/general-template.php
index 1d15d99..88b1a30 100644
--- src/wp-includes/general-template.php
+++ src/wp-includes/general-template.php
@@ -471,7 +471,7 @@ function wp_login_form( $args = array() ) {
 	$login_form_bottom = apply_filters( 'login_form_bottom', '', $args );
 
 	$form = '
-		<form name="' . $args['form_id'] . '" id="' . $args['form_id'] . '" action="' . esc_url( wp_login_url() ) . '" method="post">
+		<form name="' . $args['form_id'] . '" id="' . $args['form_id'] . '" action="' . esc_url( site_url( 'wp-login.php', 'login_post' ) ) . '" method="post">
 			' . $login_form_top . '
 			<p class="login-username">
 				<label for="' . esc_attr( $args['id_username'] ) . '">' . esc_html( $args['label_username'] ) . '</label>
diff --git src/wp-login.php src/wp-login.php
index 06603ee..70fc6e0 100644
--- src/wp-login.php
+++ src/wp-login.php
@@ -712,7 +712,7 @@ case 'register' :
 	login_header(__('Registration Form'), '<p class="message register">' . __('Register For This Site') . '</p>', $errors);
 ?>
 
-<form name="registerform" id="registerform" action="<?php echo esc_url( wp_registration_url() ); ?>" method="post" novalidate="novalidate">
+<form name="registerform" id="registerform" action="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login_post' ) ); ?>" method="post" novalidate="novalidate">
 	<p>
 		<label for="user_login"><?php _e('Username') ?><br />
 		<input type="text" name="user_login" id="user_login" class="input" value="<?php echo esc_attr(wp_unslash($user_login)); ?>" size="20" /></label>
@@ -878,7 +878,7 @@ default:
 	}
 ?>
 
-<form name="loginform" id="loginform" action="<?php echo esc_url( wp_login_url() ); ?>" method="post">
+<form name="loginform" id="loginform" action="<?php echo esc_url( site_url( 'wp-login.php', 'login_post' ) ); ?>" method="post">
 	<p>
 		<label for="user_login"><?php _e('Username') ?><br />
 		<input type="text" name="log" id="user_login"<?php echo $aria_describedby_error; ?> class="input" value="<?php echo esc_attr( $user_login ); ?>" size="20" /></label>