Recently 2 of my wordpress powered websites were hacked.† Not really taken down like traditional hacks but rather some random code or script was injected into the header and/or footer areas of the site.† Both websites† are on separate web hosts and in both cases sites were running wordpress 2.8 (not the latest one)
One solution is to delete ALL folders & files in your wordpress site but save the WP-Content Folder & wp-config.php file. Upload the new wordpress files and run the upgrade utility in your admin login area.
In essence this is how you manually upgrade your site
However sometimes your theme files could also be infected so running an upgrade would not help. Read More »