Forget about CORS errors or XSS attacks forever!

Tame the Web Security model and build ultra-secure applications that are indestructible like strongholds!

In less that 1 hour you will...

✔️ Learn about the most important Web Security principle that dictates how browsers run the websites (Same-origin policy rules them all!),

✔️ Understand the reason behind CORS errors (yes, yes - this infamous No Access Control Allow Origin headers is present error!),

✔️ Build a standard cross-site scripting attacks prevention shield (yes, there is a standard way to prevent XSS),

✔️ Setup reporting features to catch attack attempts (yes, there are also standards for that!),

✔️ Create integrity checks on external scripts (again, to eliminate the risk of XSS attacks!).

In-depth theory explanations

You will learn about all the WHATS and WHYS behind the presented concepts to have the crystal clear understanding

Real-life coding laboratories

You will see the concepts applied in practice in dedicated laser-focused coding labs and play with them on your own

What students are saying

Student's testimonial
Student's testimonial

Bartosz Pietrucha


  • Taught hundreds of developers around the World
  • Holds a Master's degree in Computer Science
  • Spoke at conferences like AngularUP, ngVikings, NG-Colombia,, HolyJS and more
  • Worked at companies like Credit Suisse, UBS, F-Secure, Tecnotree building enterprise software
  • Runs WebSecurity Academy program



The training is designed to give you 10x more value than you expect. But, if for whatever reason you will not be satisfied, then you can write an email within 30 days since your purchase to [email protected] and I will give you the money back.

My goal is to help you as much as possible. 💪


Clickable PDF - Web Application Security Checklist



This training is for developers who want to understand the WHAT, WHY, and HOW, instead of copy-pasting the code snippets from StackOverflow.

If you expect some dirty hacks or shortcuts, you will not find it here!