Group-Office contains a flaw that may allow an attacker to carry out an SQL injection attack. The issue is due to the modules/calendar/json.php script not properly sanitizing user-supplied input to the 'sort' parameter. This may allow an attacker to inject or manipulate SQL queries in the back-end database, allowing for the manipulation or disclosure of arbitrary data.
Remote / Network Access
Loss of Integrity
Upgrade to version 4.0.90 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.