"502 Bad Gateway" error within Citrix Insight Services (CIS)

After logging in Citrix Insight Services site and clicking Tools-Upload Data, "502 Bad Gateway" error is shown as below...

CVE-2008-0050

CVE-2008-0050 : The issue affects CFNetwork in Apple Mac OS X 10.4.11. A remote HTTPS proxy server can spoof secure websites by embedding data in a 502 Bad Gateway response, potentially misleading users about the authenticity of the site. The available description states the vulnerability and its...