Splunk Enterprise 5.0.x before 5.0.18, 6.0.x before 6.0.14, 6.1.x before 6.1.13, 6.2.x before 6.2.13.1, 6.3.x before 6.3.10, 6.4.x before 6.4.6, and 6.5.x before 6.5.3 and Splunk Light before 6.5.2 assigns the $C JS property to the global Window namespace, which might allow remote attackers to obtain sensitive logged-in username and version-related information via a crafted webpage.
https://www.splunk.com/view/SP-CAAAPZ3#InformationLeakageviaJavaScriptCVE20175607
https://www.exploit-db.com/exploits/41779/
http://www.securitytracker.com/id/1038170
http://www.securityfocus.com/bid/97286
http://www.securityfocus.com/bid/97265
http://www.securityfocus.com/archive/1/540346/100/0/threaded
http://seclists.org/fulldisclosure/2017/Mar/89
http://hyp3rlinx.altervista.org/advisories/SPLUNK-ENTERPRISE-INFORMATION-THEFT.txt