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Broken Access Control is one of the most dangerous and overlooked security flaws on the web. It happens when an application fails to properly check who can do what — allowing attackers to reach areas or functions meant only for administrators.

In this video, I explain how small design mistakes in role management or cookie handling can turn into a full system compromise. You’ll see how relying on the browser or client-side values for permissions can expose your users, your data, and your business to major risks.

Broken Access Control isn’t a theoretical issue. It’s the leading cause of real-world data breaches, privilege escalation, and compliance violations. When authorization is handled incorrectly, attackers can change configurations, steal information, or even lock legitimate users out.

This session walks through the concept in simple terms, shows how such flaws arise in everyday development, and outlines the right way to fix them — by enforcing strong, server-side authorization and never trusting what comes from the client.

If you build or manage web applications, understanding this vulnerability is critical. A single missing check can open the door to a complete takeover.

Stay informed. Secure your code. And remember — trust logic belongs on the server, not in the browser.