WordPress.org had released their WordPress 2.1.2 today, but sadly it’s is not a feature upgrade, instead it’s an emergency security upgrade due to believe that a hacker had changed one of the WordPress 2.1.1 file in one of the WordPress server, here is what Matt said:
It was determined that a cracker had gained user-level access to one of the servers that powers wordpress.org, and had used that access to modify the download file. We have locked down that server for further forensics, but at this time it appears that the 2.1.1 download was the only thing touched by the attack. They modified two files in WP to include code that would allow for remote PHP execution.
This is something very serious and the thing that u think will ever happen in your nightmare, but now it happened, so if your are using WordPress 2.1.1, Please upgrade immediately!!