Top 7 Common Programmers Security Mistakes

I've cherry picked these 7 as my personal favorites. The top seven isn't based upon any research other then my personal experience with auditing code from websites and open source/commercial software. They span from Cross Site Scripting to pure SQL injection, I'm a big fan of SQL injection, because it can lead to a quick compromise. It is so dangerous that one can compare it of getting root instantly. My next favorite is Cross Site Scripting, because with Javascript one can do so much. So, let's get started with my Top 7 of most common security mistakes made by programmers.