WordPress 2.2.2 is one of those updates that should be applied as soon as possible to make sure that your blog does not get compromised. Several of the vulnerabilities are those that have been mentioned earlier by the guy who created the first WordPress worm who fixed those vulnerabilities. Those are now the official updates from the WordPress team.

4452 wpx can include invalid named entities in comment author name
4477 Unfiltered post titles in Recent Comments widget
4510 “WordPress requires at least 4.1″ expression in wp-settings.php
4522 Template: default broken
4587 Restore comment editing fix that disabled rich text editing
4629 deleted_link action is never called
4683 category dropdown javascript wrong location after moved blog
4692 Wordpress /edit-comments.php Database Error (Bug)
4429 add_option followed by update_option not always working
4689 Wordpress uploads.php Cross-Site Scripting Vulnerability