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If you are breaking into cybersecurity or aiming to level up your bug bounty game, The XSS Rat offers one of the most hands-on, community-driven training catalogs in application security. Known for his no-nonsense “Uncle Rat” methodology, his courses cut through theoretical fluff to focus directly on real-world reconnaissance, exploit chaining, and practical pentesting workflows.

Below is a complete overview of the full course catalog, spanning foundational networking, deep-dive vulnerability handbooks, certification tracks, and methodology guides.

Master the skills needed to detect, investigate, and respond to modern identity-based attacks across cloud, on-premises, and AI-driven environments. SEC559 is an advanced, hands-on cybersecurity course from SANS Institute that explores how attackers exploit credentials, authentication tokens, OAuth permissions, application identities, and hybrid trust relationships to gain persistent access and escalate privileges.

Starting from scratch, you will learn the entire process hands-on from the fundamentals of web technologies and using Burp Suite on the TryHackMe platform to critical vulnerabilities such as SQL Injection and XSS, all by attacking a real web application.

Modern VoIP environments are complex systems where signaling, media, networking, security and infrastructure all work together in real time. When problems occur, identifying the root cause often requires much more than theoretical SIP knowledge.