diff --git a/wp-login.php b/wp-login.php
index b4a282ca7d..a61facc4f9 100644
--- a/wp-login.php
+++ b/wp-login.php
@@ -79,9 +79,9 @@ function login_header($title = 'Log In', $message = '', $wp_error = '') {
 </head>
 <body class="login">
 <?php   if ( !is_multisite() ) { ?>
-<div id="login"><h1><a href="<?php echo apply_filters('login_headerurl', 'http://wordpress.org/'); ?>" title="<?php echo apply_filters('login_headertitle', esc_attr__('Powered by WordPress')); ?>"><?php bloginfo('name'); ?></a></h1>
+<div id="login"><h1><a href="<?php echo esc_url( apply_filters('login_headerurl', 'http://wordpress.org/') ); ?>" title="<?php echo esc_attr( apply_filters('login_headertitle', __( 'Powered by WordPress' ) ) ); ?>"><?php bloginfo('name'); ?></a></h1>
 <?php   } else { ?>
-<div id="login"><h1><a href="<?php echo apply_filters('login_headerurl', network_home_url() ); ?>" title="<?php echo apply_filters('login_headertitle', esc_attr($current_site->site_name) ); ?>"><span class="hide"><?php bloginfo('name'); ?></span></a></h1>
+<div id="login"><h1><a href="<?php echo esc_url( apply_filters('login_headerurl', network_home_url() ) ); ?>" title="<?php echo esc_attr( apply_filters('login_headertitle', $current_site->site_name ) ); ?>"><span class="hide"><?php bloginfo('name'); ?></span></a></h1>
 <?php   }
 
 	$message = apply_filters('login_message', $message);
@@ -119,7 +119,7 @@ function login_header($title = 'Log In', $message = '', $wp_error = '') {
  */
 function login_footer($input_id = '') {
 	?>
-	<p id="backtoblog"><a href="<?php bloginfo('url'); ?>/" title="<?php esc_attr_e('Are you lost?') ?>"><?php printf(__('&larr; Back to %s'), get_bloginfo('title', 'display' )); ?></a></p>
+	<p id="backtoblog"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php esc_attr_e( 'Are you lost?' ); ?>"><?php printf( __( '&larr; Back to %s' ), get_bloginfo( 'title', 'display' ) ); ?></a></p>
 	</div>
 
 <?php if ( !empty($input_id) ) : ?>
@@ -400,7 +400,7 @@ case 'retrievepassword' :
 
 ?>
 
-<form name="lostpasswordform" id="lostpasswordform" action="<?php echo site_url('wp-login.php?action=lostpassword', 'login_post') ?>" method="post">
+<form name="lostpasswordform" id="lostpasswordform" action="<?php echo esc_url( site_url( 'wp-login.php?action=lostpassword', 'login_post' ) ); ?>" method="post">
 	<p>
 		<label for="user_login" ><?php _e('Username or E-mail:') ?><br />
 		<input type="text" name="user_login" id="user_login" class="input" value="<?php echo esc_attr($user_login); ?>" size="20" tabindex="10" /></label>
@@ -411,9 +411,9 @@ case 'retrievepassword' :
 </form>
 
 <p id="nav">
-<a href="<?php echo site_url('wp-login.php', 'login') ?>"><?php _e('Log in') ?></a>
-<?php if (get_option('users_can_register')) : ?>
- | <a href="<?php echo site_url('wp-login.php?action=register', 'login') ?>"><?php _e('Register') ?></a>
+<a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e('Log in') ?></a>
+<?php if ( get_option( 'users_can_register' ) ) : ?>
+ | <a href="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login' ) ); ?>"><?php _e( 'Register' ); ?></a>
 <?php endif; ?>
 </p>
 
@@ -436,7 +436,7 @@ case 'rp' :
 		$errors = new WP_Error('password_reset_mismatch', __('The passwords do not match.'));
 	} elseif ( isset($_POST['pass1']) && !empty($_POST['pass1']) ) {
 		reset_password($user, $_POST['pass1']);
-		login_header(__('Password Reset'), '<p class="message reset-pass">' . __('Your password has been reset.') . ' <a href="' . site_url('wp-login.php', 'login') . '">' . __('Log in') . '</a></p>');
+		login_header( __( 'Password Reset' ), '<p class="message reset-pass">' . __( 'Your password has been reset.' ) . ' <a href="' . esc_url( wp_login_url() ) . '">' . __( 'Log in' ) . '</a></p>' );
 		login_footer();
 		exit;
 	}
@@ -447,7 +447,7 @@ case 'rp' :
 	login_header(__('Reset Password'), '<p class="message reset-pass">' . __('Enter your new password below.') . '</p>', $errors );
 
 ?>
-<form name="resetpassform" id="resetpassform" action="<?php echo site_url('wp-login.php?action=resetpass&key=' . urlencode($_GET['key']) . '&login=' . urlencode($_GET['login']), 'login_post') ?>" method="post">
+<form name="resetpassform" id="resetpassform" action="<?php echo esc_url( site_url( 'wp-login.php?action=resetpass&key=' . urlencode( $_GET['key'] ) . '&login=' . urlencode( $_GET['login'] ), 'login_post' ) ); ?>" method="post">
 	<input type="hidden" id="user_login" value="<?php echo esc_attr( $_GET['login'] ); ?>" autocomplete="off" />
 
 	<p>
@@ -467,9 +467,9 @@ case 'rp' :
 </form>
 
 <p id="nav">
-<a href="<?php echo site_url('wp-login.php', 'login') ?>"><?php _e('Log in') ?></a>
-<?php if (get_option('users_can_register')) : ?>
- | <a href="<?php echo site_url('wp-login.php?action=register', 'login') ?>"><?php _e('Register') ?></a>
+<a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e( 'Log in' ); ?></a>
+<?php if ( get_option( 'users_can_register' ) ) : ?>
+ | <a href="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login' ) ); ?>"><?php _e( 'Register' ); ?></a>
 <?php endif; ?>
 </p>
 
@@ -506,7 +506,7 @@ case 'register' :
 	login_header(__('Registration Form'), '<p class="message register">' . __('Register For This Site') . '</p>', $errors);
 ?>
 
-<form name="registerform" id="registerform" action="<?php echo site_url('wp-login.php?action=register', 'login_post') ?>" method="post">
+<form name="registerform" id="registerform" action="<?php echo esc_url( site_url('wp-login.php?action=register', 'login_post') ); ?>" method="post">
 	<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(stripslashes($user_login)); ?>" size="20" tabindex="10" /></label>
@@ -523,8 +523,8 @@ case 'register' :
 </form>
 
 <p id="nav">
-<a href="<?php echo site_url('wp-login.php', 'login') ?>"><?php _e('Log in') ?></a> |
-<a href="<?php echo wp_lostpassword_url() ?>" title="<?php esc_attr_e('Password Lost and Found') ?>"><?php _e('Lost your password?') ?></a>
+<a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e( 'Log in' ); ?></a> |
+<a href="<?php echo esc_url( wp_lostpassword_url() ); ?>" title="<?php esc_attr_e( 'Password Lost and Found' ) ?>"><?php _e( 'Lost your password?' ); ?></a>
 </p>
 
 <?php
@@ -626,7 +626,7 @@ default:
 	$rememberme = ! empty( $_POST['rememberme'] );
 ?>
 
-<form name="loginform" id="loginform" action="<?php echo site_url('wp-login.php', 'login_post') ?>" 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" class="input" value="<?php echo esc_attr($user_login); ?>" size="20" tabindex="10" /></label>
@@ -652,10 +652,10 @@ default:
 <p id="nav">
 <?php if ( isset($_GET['checkemail']) && in_array( $_GET['checkemail'], array('confirm', 'newpass') ) ) : ?>
 <?php elseif ( get_option('users_can_register') ) : ?>
-<a href="<?php echo site_url('wp-login.php?action=register', 'login') ?>"><?php _e('Register') ?></a> |
-<a href="<?php echo wp_lostpassword_url() ?>" title="<?php esc_attr_e('Password Lost and Found') ?>"><?php _e('Lost your password?') ?></a>
+<a href="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login' ) ); ?>"><?php _e( 'Register' ); ?></a> |
+<a href="<?php echo esc_url( wp_lostpassword_url() ); ?>" title="<?php esc_attr_e( 'Password Lost and Found' ); ?>"><?php _e( 'Lost your password?' ); ?></a>
 <?php else : ?>
-<a href="<?php echo wp_lostpassword_url() ?>" title="<?php esc_attr_e('Password Lost and Found') ?>"><?php _e('Lost your password?') ?></a>
+<a href="<?php echo esc_url( wp_lostpassword_url() ); ?>" title="<?php esc_attr_e( 'Password Lost and Found' ); ?>"><?php _e( 'Lost your password?' ); ?></a>
 <?php endif; ?>
 </p>
 <?php } ?>
