ESAFENET CDG HookInvalidCourseService.java removeHookInvalidCourse sql injection

A vulnerability was found in ESAFENET CDG 5. It has been classified as critical. Affected is the function removeHookInvalidCourse of the file /com/esafenet/servlet/system/HookInvalidCourseService.java. The manipulation of the argument id leads to sql injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.