I have big network of wordpress sites on different hosting companies and servers (shared, vps, dedi)... All sites are always on latest WP version and all plugins are updated. In last one month many of sites are hacked. Every day I find few new sites that are hacked. I know about timthumb exploit and I updated it on sites that have theme with timthumb, but most of them don't have it. Can anybody give some advice what to do in order to stop feature hacks ? It looks like WP has more holes then ever before.