An open source database of disallowed usernames for software projects to prevent phishing and impersonation.
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disallowed usernames.csv

Disallowed Usernames

The goal of this project is to create a universal database of disallowed usernames for web applications. This repository contains a list of keywords that should be banned/disallowed to prevent users from registering with, on your software projects and apps to prevent impersonation and phishing on your platform.




For example, you don't want someone to sign-up with the username titled support or administrator. And depending on your setup, they could probably generate something like:


and use this to send out emails impersonating as someone un-suspecting from your application.

How to use this

You can import this file directly from your database's GUI (like phpMyAdmin, Sequel Pro, HeidiSQL).


This project is licensed under the MIT License