The host is installed with Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8 or SeaMonkey before 2.13 and is prone to security bypass vulnerability. A flaw is present in the applications, which fail to properly restrict JSAPI access to the GetProperty function. Successful exploitation could allow attackers to bypass the Same Origin Policy and possibly have unspecified other impact.