If you still have the old version of Wordpress deployed, remember your site can be easily hacked because of known exploits. The hackers may or may not have a lot to gain by injecting malware or spammy links on your website but if you own the website, it could be your worst nightmare.
A spammed website will most likely be ignored by search engine crawlers resulting in dropped rankings. In fact, Technorati is totally junking the older versions of WP from its system.
Sites like Security Focus are publishing a bunch of hacks possible on older versions of Wordpress. So before you get mugged by a script kiddie, take the necessary action.
Lets say one fine day you wake up and realize your blog has been a victim of such an attack, what do you do?
