Cross-site scripting (XSS) vulnerability in the error handling page in DotNetNuke 4.6.2 through 4.8.3 allows remote attackers to inject arbitrary web script or HTML via the querystring parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43026
http://www.securityfocus.com/bid/29686
http://www.dotnetnuke.com/News/SecurityPolicy/SecurityBulletinno18/tabid/1165/Default.aspx