Observatory : Observatory by Mozilla is a project designed to help developers, system administrators, and security professionals configure their sites safely and se...
API Security Checklist : Checklist of the most important security countermeasures when designing, testing, and releasing your API.
XSS Filter Evasion Cheat Sheet - OWASP : This article is focused on providing application security testing professionals with a guide to assist in Cross Site Scripting testing.
The Big List of Naughty Strings : The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data.
This article explains what secure headers are and how to implement these headers in Rails, Django, Express.js, Go, Nginx, and Apache.