Apple seems to have patched this vulnerability within the last day or so with a Java update for Lion and Snow Leopard. The “however” here is the flaw seems to have been known for some time and a Windows patch was delivered back in February. Apple did take more time to update their Java install. It is out and available now, so patch your system soon. If you have not run a System Update, you can do so by:
If you are concerned and wish to investigate your Mac further, Mac Guides and Solutions offers some good items to check within System Preferences and identifying weak spots within your system.
Disclosure: At Story Institute and MousePad Travel, we receive compensation through iTunes, Amazon, HostMonster, and Google affiliate programs by linking to products. We are independently owned and share only our personal opinions.