From e31e6996633043a1170ece7828b86f9dfa67c782 Mon Sep 17 00:00:00 2001
From: "Aaron D. Campbell" <aaroncampbell@git.wordpress.org>
Date: Wed, 11 Jan 2017 01:44:36 +0000
Subject: [PATCH] Add nonce for widget accessibility mode.

Props vortfu.

See #23328.

Merges [39760] to 4.4 branch.


git-svn-id: https://develop.svn.wordpress.org/branches/4.4@39764 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/class-wp-screen.php | 3 ++-
 src/wp-admin/widgets.php                  | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/wp-admin/includes/class-wp-screen.php b/src/wp-admin/includes/class-wp-screen.php
index 5910c75024..ffdfa4f52b 100644
--- a/src/wp-admin/includes/class-wp-screen.php
+++ b/src/wp-admin/includes/class-wp-screen.php
@@ -915,7 +915,8 @@ final class WP_Screen {
 
 		switch ( $this->base ) {
 			case 'widgets':
-				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n";
+				$nonce = wp_create_nonce( 'widgets-access' );
+				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on&_wpnonce=' . urlencode( $nonce ) . '">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off&_wpnonce=' . urlencode( $nonce ) . '">' . __('Disable accessibility mode') . "</a></p>\n";
 				break;
 			case 'post' :
 				$expand = '<fieldset class="editor-expand hidden"><legend>' . __( 'Additional settings' ) . '</legend><label for="editor-expand-toggle">';
diff --git a/src/wp-admin/widgets.php b/src/wp-admin/widgets.php
index 0abd81c244..9cd1b531a8 100644
--- a/src/wp-admin/widgets.php
+++ b/src/wp-admin/widgets.php
@@ -22,6 +22,8 @@ if ( ! current_user_can( 'edit_theme_options' ) ) {
 
 $widgets_access = get_user_setting( 'widgets_access' );
 if ( isset($_GET['widgets-access']) ) {
+	check_admin_referer( 'widgets-access' );
+
 	$widgets_access = 'on' == $_GET['widgets-access'] ? 'on' : 'off';
 	set_user_setting( 'widgets_access', $widgets_access );
 }