01 - Introduction to Same-Origin Policy (SOP)
Explore the theoretical foundations, architectural mechanisms, origin mathematical rules, and threat landscape of the browser Same-Origin Policy (SOP).
02 - CORS Mechanics & Protocol Specification
Master the mechanics of Cross-Origin Resource Sharing (CORS): simple requests, preflight OPTIONS exchanges, credential handling, and header specifications.
03 - CORS Misconfigurations and Attack Vectors
Deconstruct the top 6 CORS security vulnerabilities: arbitrary origin reflection, regex bypasses, null origin exploitation, XSS pivoting, and cache poisoning.
04 - Secure CORS Implementation & Mitigations
Production-ready, secure CORS implementation patterns across Node.js (Express), Python (FastAPI, Flask), Go (Gin), Java (Spring Boot), Nginx, and Apache.
05 - CORS Auditing & Security Tooling
Audit CORS security using cURL, Burp Suite, CORStest, Nuclei, custom Python scanners, and Semgrep SAST rules for CI/CD pipelines.
06 - Hands-On Lab: Exploiting and Remediating CORS
Step-by-step hands-on lab: build a vulnerable Flask API, execute a complete cross-origin data exfiltration exploit PoC, apply secure allowlist remediation, and verify with an automated test suite.
07 - References and Standards
Authoritative specifications, standards, CVE analyses, academic research papers, OWASP cheat sheets, and tool repositories for CORS and SOP security.
CORS & Same-Origin Policy Security Masterclass
Master Same-Origin Policy (SOP) and Cross-Origin Resource Sharing (CORS) security. Learn protocol mechanics, attack vectors, production-grade defenses, multi-language code snippets, and auditing tools.