Arbor Networks Peakflow SP 'index/' Cross Site Scripting Vulnerability

This host is running Arbor Networks Peakflow SP and is prone to cross site scripting vulnerability.
Successful exploitation will allow remote attackers to insert arbitrary HTML and script code, which will be executed in a user's browser session in the context of an affected site. Impact Level: Application
Upgrade to Arbor Networks Peakflow SP 5.1.1 patch 6, 5.5 patch 4, 5.6.0 patch 1 or later For updates refer to
Input appended to the URL after 'index/' in the login interface is not properly sanitised before being returned to the user.
Arbor Networks Peakflow SP 5.1.1 before patch 6, 5.5 before patch 4, and 5.6.0 before patch 1