OWASP Top 10 Explorer (2021)
Explore the OWASP Top 10 (2021) web security risks interactively — clear explanations, real examples and prevention steps for each. Free, from Neurobyte.
About this training
The OWASP Top 10 is the security industry's reference list of the most critical web application risks, used by developers, testers and security teams worldwide. This free interactive explorer walks through the 2021 edition — from Broken Access Control and Cryptographic Failures to Injection, Insecure Design and Server-Side Request Forgery — with clear explanations, real-world examples and concrete prevention steps for each category.
It's built for developers who want to write more secure code and for teams onboarding to application security. Work through each risk to understand not just what it is, but how it happens and how to design and code defensively against it. For a hands-on follow-up, try our Secure Code Trainer and Vulnerable Web App Lab.
Frequently asked questions
What is the OWASP Top 10?
It's a regularly updated, community-driven list of the ten most critical web application security risks, published by the Open Worldwide Application Security Project (OWASP). It's a widely adopted baseline for secure development and testing.
Is this training free?
Yes, the OWASP Top 10 explorer is completely free and needs no sign-up. It runs in your browser and is suitable for individual developers and whole teams.
How do I move from learning to practising?
After exploring the categories here, apply them hands-on with our Secure Code Trainer (spot flaws in real snippets) and the Vulnerable Web App Lab (safely exploit and then fix common vulnerabilities).