We saw this great article recently discussing the prevention of hacking on your WordPress website by hiding the WordPress version number. The article is here:
The outcome of the article of course was that this isn’t going to really help prevent WordPress hacking, as hacking is just not that simple.
There are a lot of ways hackers can try to hack your WordPress website and many of these are automated. The article concludes by recommending updating your WordPress version regularly – check out the link above for more!