Upgrade Java now ...
In case you are having Java 7 below update 11 for your webbrowser , please upgrade it now. Now as in :
Due to the severity of these vulnerabilities, the public disclosure of technical details and the reported exploitation of CVE-2013-0422 "in the wild," Oracle strongly recommends that customers apply the updates provided by this Security Alert as soon as possible.
You find the more information in the blog article “Security Alert for CVE-2013-0422 Released” linking to the security alert as well. You can download Version 7 Update 11 at java.com.