Apple has released a new Java update called Java for OS X 2013-005. According to the release notes, the update "delivers improved security, reliability, and compatibility for Java SE 6. Java for OS X 2013-005 supersedes all previous versions of Java for OS X."
Of note, however, is another addendum to the update that reveals it will also uninstall older Apple-provided Java applet plug-ins:
This update uninstalls the Apple-provided Java applet plug-in from all web browsers. To use applets on a web page, click on the region labeled "Missing plug-in" to go download the latest version of the Java applet plug-in from Oracle.
Java has long been a source of OS X security flaws