How To Stop Spam Registrations On WordPress
I’ve been contacted by clients a couple of times over the past month about spam user registrations on their sites.  This post will show  you how to stop spam registrations on WordPress in two seconds flat.
They are getting hundreds of spam user registrations on their site, and are seeing increasing amounts of spam comments. They then have to delete these users and the spam, it’s a time suck and pain for the site owner. Â They are concerned this is some type of hack attack.
Here is a 2 second fix to stop spammers registering users on your site.
What They Do
The spammer will use scripts to search for sites that have open user registrations. Then using more scripts they add new users to your site.
You can check if  you site is open to user registrations by going to this URL
http://yoursite.com/wp-login.php?action=register
If registrations are open you will see:
If they are closed you will see:
Why Do They Do This
Some sites set their comments to auto approve from registered users, this means that spam links can be added to comments and made live without moderation. Â This then increases people search engine rankings.
If you think this is an automated process you can see how thousands of links can be generated and rankings increased for suspect sites.
It’s not a malicious attack against your site, rather it is spammers trying ot game google and increase ranking for their shoddy wares. Â It’s also a pain in the a!se to clean up spam registrations.
How To Close it Down
This is very, very technical, go to settings -> general and un-check this box
Unless you have a site that required registration for memberships or email plugins there is no real need to keep this open, please check with your plugin documentation to see if you need this to be enabled.
We are of course available to hire for this complex procedure
Please Tell Me It’s Not Set To Admin
I have seen certain WordPress sites that have registrations enabled and the default user setting are administrators. Â This leaves your site wide open to hackers using the same techniques, and I have seen sites hacked because they have not closed this simple loophole.
Wrap Up
Unless you have a very real need to keep user registrations open I always recommend closing this function down to keep the spammers at bay.