ZOHO ManageEngine OpManager 11.5 build 11600 and earlier uses a hardcoded password of "plugin" for the IntegrationUser account, which allows remote authenticated users to obtain administrator access by leveraging knowledge of this password.
https://www.exploit-db.com/exploits/38221/
https://support.zoho.com/portal/manageengine/helpcenter/articles/pgsql-submitquery-do-vulnerability
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-7664
http://seclists.org/fulldisclosure/2015/Sep/66
http://packetstormsecurity.com/files/133596/ManageEngine-OpManager-Remote-Code-Execution.html