Keeping WebLogic Server Up-to-Date
Part of the BEA WebLogic Server 8 For Dummies Cheat Sheet
You should be aware of any patches as well as the current version of WebLogic Server. Patches correct errors and security issues that occur between major releases of WebLogic Server. You should download and install patches for WebLogic Server as well as other system components. This is particularly true of the Windows operating system, which has many security patches available.
When the security of a system is compromised, it's often because the administrator didn't have the most up-to-date patch installed.
Upgrading to the current version of WebLogic Server is much less critical than applying operating system and WebLogic Server patches. Sometimes it takes a redesign of the source code to get the current version to work properly. After the initial release of a new version, many companies prefer to wait until the release has been proven. When you decide to upgrade to the latest version of WebLogic Server, you should do so on a test server. Then, after you verify that the test server is performing well, you can put the new version onto your production system.
You can find the most up-to-date information on the Oracle WebLogic Server web page.