TL;DR
Blocks account enumeration attempts
Description
After speaking at WordCamp St. Louis 2017 I was asked if I could bundle the code I demo’ed in the talk into a plugin for people who aren’t as comfortable writing their own code. As its name implies, it is super simple. There are no settings. The entire codebase is contained in one file, and for the most part is about 20 lines of code in length. It is fully commented and I encourage you to look at the code to see what it does instead of blindly trusting it.
This plugin, by itself, will not protect your site from being compromised. However, it can be an important layer of defense when used in a multilayer, defense-in-depth security strategy.
Download link
https://wordpress.org/plugins/super-simple-account-enumeration-blocker/