Polycom RealPresence Resource Manager (aka RPRM) before 8.4 allows remote authenticated users to obtain the installation path via an HTTP POST request to PlcmRmWeb/JConfigManager.
https://www.exploit-db.com/exploits/37449/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-4701
http://www.securityfocus.com/bid/75432
http://www.securityfocus.com/archive/1/535852/100/0/threaded