Challenge: Bjoern’s Favorite Pet | Difficulty: ⭐⭐⭐ | Focus: OSINT & Broken Authentication

File uploads are one of the easiest ways to introduce dangerous content into a web application. Here is how to validate, isolate, and…

Your application can have secure authentication, carefully validated inputs, and well-written backend code, yet still expose users to…

A Python developer’s lesson in API testing, automation, and why passing tests can give you a dangerously false sense of security.

I used to treat security reconnaissance as a collection of commands. Then I started connecting the pieces with Python, and realized that…

Explaining web networking basics through Ruth and Martin’s bookshelf exchange.

A data grid can display thousands of records and still leave users doing too much work.

Your API can have authentication, input validation, and a solid database architecture and still be vulnerable to abuse if you get rate…

An introduction to broken access control, IDOR, OTP weaknesses, cross-site scripting, and SQL injection.

How I chained weak authentication, cookie manipulation, IDOR, path traversal and OS command injection to compromise an intentionally…