I have just finished upgrading my WordPress blog to version 2.8.6. It is important that you do it too. As this news will really be a matter of concern for almost all bloggers using WordPress. WordPress is perhaps the most popular blogging platform in the world.
There were two security issues that were found in 2.8.5 which is fixed in 2.8.6 . Therefore, it is of utmost importance that you upgrade now!
One security problem in WordPress Version 2.8.5 was an issue with sanitizing uploaded file names that can be exploited in certain Apache configurations (you do not really have to care that much about it). The other major issues was a security problems that can be exploited by registered, logged in users who have posting privileges. So if you have giving author priveleges to any untrusted authors, WordPress has recommended an instant upgrade to ver. 2.8.6. Hope all of you have upgraded.