By using a captcha test on your login form you’ll prevent brute-force attacks and prevent some 0-day exploits from gaining access to your site. Every time a user wants to login he’ll have to solve a simple math problem like “4 + 1 = “.

To fix the problem and protect the login form simply add one of the plugins that provide this facility.

If you are concerned about WordPress security on your site, we encourage you to follow the full set of tips on our WordPress Security page.  And get in touch if you need help with protecting your site from hackers.