As the author states, this exploit requires that Microsoft Windows is running with Administrator privilege and Internet Explorer is set to run unsafe ActiveX controls.
There is no privilege escalation with this exploit because the browser calling the ActiveX control must be running as Administrator. The overall safety of a given ActiveX control must be considered not only in terms of the ActiveX control itself (VMware vielib.dll is no less safe than many other ActiveX controls installed on Windows sytems), but also in terms of the privileges of the process calling it and the trustworthiness of the code controlling that calling process.
To avoid malicious scripts that exploit ActiveX controls, do not enable unsafe ActiveX objects in your browser settings. As a best practice, do not browse untrusted Web sites as an Administrator.
