OWASP Top 10 Full Course — All 10 Web Vulnerabilities Explained for Beginners

Almost every web application breach you read about traces back to one of ten flaws. Not exotic zero-days — ten ordinary, well-documented mistakes that keep shipping anyway. This is the complete OWASP Top 10, all ten categories walked through end to end on one whiteboard, in the 2025 ordering. No lab setup, no prerequisites, no tooling to install. Each part explains what the flaw actually is, how an attacker reaches it, what it looks like in real code and real incidents, and the specific control that closes it: broken access control and IDOR, security misconfiguration, software supply chain failures from SolarWinds to xz Utils, cryptographic failures, injection, insecure design, authentication failures, integrity failures, logging and alerting gaps, and mishandling exceptional conditions. By the end you will be able to look at an application and name the category a weakness belongs to, explain the attack path to someone who has to fix it, and tell a real control apart from a checkbox. Use the chapters below to jump to any part. A written deep-dive for every part is linked underneath. ⏱️ Chapters: 0:00 - Introduction 0:41 - Part 1: Broken Access Control Explained (IDOR, Privilege Escalation) 14:03 - Part 2: Security Misconfiguration — Default Creds, Open Buckets & More 25:05 - Part 3: Software Supply Chain Attacks — From SolarWinds to xz Utils 36:08 - Part 4: Cryptographic Failures — Weak Hashes, Hardcoded Keys & Bad Randomness 46:54 - Part 5: Injection Explained (SQL Injection, Command Injection, and More) 58:09 - Part 6: Insecure Design Explained — Security Flaws Baked Into the Architecture 1:08:09 - Part 7: Authentication Failures — Credential Stuffing, MFA & Session Hijacking 1:17:22 - Part 8: How Attackers Exploit Unsigned Updates and Deserialization 1:27:16 - Part 9: Security Logging & Alerting Failures — Why Breaches Go Unnoticed for Months 1:35:27 - Part 10: Mishandling Exceptional Conditions — Fail Secure, Not Fail Open (Series Finale) 📖 Deep-dive write-up: Full section-by-section index: https://hlc-official.blogspot.com/202... 1. Broken Access Control Explained (IDOR, Privilege Escalation) https://hlc-official.blogspot.com/202... 2. Security Misconfiguration — Default Creds, Open Buckets & More https://hlc-official.blogspot.com/202... 3. Software Supply Chain Attacks — From SolarWinds to xz Utils https://hlc-official.blogspot.com/202... 4. Cryptographic Failures — Weak Hashes, Hardcoded Keys & Bad Randomness https://hlc-official.blogspot.com/202... 5. Injection Explained (SQL Injection, Command Injection, and More) https://hlc-official.blogspot.com/202... 6. Insecure Design Explained — Security Flaws Baked Into the Architecture https://hlc-official.blogspot.com/202... 7. Authentication Failures — Credential Stuffing, MFA & Session Hijacking https://hlc-official.blogspot.com/202... 8. How Attackers Exploit Unsigned Updates and Deserialization https://hlc-official.blogspot.com/202... 9. Security Logging & Alerting Failures — Why Breaches Go Unnoticed for Months https://hlc-official.blogspot.com/202... 10. Mishandling Exceptional Conditions — Fail Secure, Not Fail Open (Series Finale) https://hlc-official.blogspot.com/202... 🔗 Related videos: New cybersecurity and AI explainers every week on High Level Cyber.    / @highlevelcyber