WordPress Security Update: 2.1.3
Quick note: if you’re running WordPress 2.x, there are security releases waiting for you: WordPress 2.1.3 and 2.0.10.
This update is highly recommend for all users of both branches.
These releases include fixes for several publicly known minor XSS issues, one major XML-RPC issue, and a proactive full sweep of the WordPress codebase to protect against future problems.
Again, the Microsummaries Plugin for WordPress just keeps working, no need to deactivate it before upgrading.