Multiple cross-site scripting vulnerabilities in PostNuke 0.760-RC3 allow remote attackers to inject arbitrary web script or HTML via the (1) module parameter to admin.php or (2) op parameter to user.php. NOTE: the vendor reports that certain issues could not be reproduced for 760 RC3, or for .750. However, the op/user.php issue exists when the pnAntiCracker setting is disabled.
https://exchange.xforce.ibmcloud.com/vulnerabilities/20018
http://securitytracker.com/id?1013670
http://news.postnuke.com/modules.php?op=modload&name=News&file=article&sid=2679
http://marc.info/?l=bugtraq&m=111298226029957&w=2