Out of date security:
This is one of the easiest fixes check monthly for updates and if you have an older version install the latest.
these cannot be avoided , hackers will always look for an exploit or security weakness to attack the key is to be vigilant and use scanning tools, up to date security and a response plan to be ready for a malicious event.
These are vicious mythological creatures who want you off of their bridge. In all seriousness in the internet world they represent those who are motivated to leave less than flattering comments on your content by an outside agenda. Your spam filter should be ready to deal with them as well as spam.
What are you doing to mange your data and website security as well as your content? Let me know in the comments below.