SQL injection vulnerability in modules/calendar/json.php in Group-Office community before 4.0.90 allows remote authenticated users to execute arbitrary SQL commands via the sort parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/78253
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-4184
http://www.securityfocus.com/bid/55383
http://www.reactionpenetrationtesting.co.uk/group-office-sqli.html
http://www.exploit-db.com/exploits/21056
http://archives.neohapsis.com/archives/bugtraq/2012-09/0011.html