################################################################################## #MyBB 1.4.3 my_post_key Disclosure Vulnerability by NBBN (http://nbbnsblog.co.cc) # ################################################################################## Vendor: http://mybboard.net Date: November 25, 2008 These URLs contains "my_post_key". Moderators and admins use these sometimes, depending on what they want to do with a thread. my_post_key is used to perform various actions and to prevent CSRF. These pages shows the posts of the users. If some of these posts have pictures, the referrer will be transfered to the server of the images. #####Vuln URLs################################################################################# http://localhost/mybb/moderation.php?action=mergeposts&tid=1&modtype=thread&my_post_key=[key] # http://localhost/mybb/moderation.php?action=split&tid=1&modtype=thread&my_post_key=[key] # http://localhost/mybb/moderation.php?action=deleteposts&tid=1&modtype=thread&my_post_key=[key] # ############################################################################################ Finally, an attacker has the postkey, and can perform some interesting moderator or administrator actions with csrf.