Top 100 Web Vulnerabilities Reference

Purpose

Provide a comprehensive, structured reference for the 100 most critical web application vulnerabilities organized by category. This skill enables systematic vulnerability identification, impact assessment, and remediation guidance across the full spectrum of web security threats. Content organized into 15 major vulnerability categories aligned with industry standards and real-world attack patterns.

Prerequisites

• Basic understanding of web application architecture (client-server model, HTTP protocol)
• Familiarity with common web technologies (HTML, JavaScript, SQL, XML, APIs)
• Understanding of authentication and authorization concepts
• Access to web application security testing tools (Burp Suite, OWASP ZAP)
• Knowledge of secure coding principles recommended

Outputs and Deliverables

• Complete vulnerability catalog with definitions, root causes, impacts, and mitigations
• Category-based vulnerability groupings for systematic assessment
• Quick reference for security testing and remediation
• Foundation for vulnerability assessment checklists and security policies

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Core Workflow

🧠 Knowledge Modules (Fractal Skills)

1. Phase 1: Injection Vulnerabilities Assessment

2. Phase 2: Authentication and Session Security

3. Phase 3: Sensitive Data Exposure

4. Phase 4: Security Misconfiguration

5. Phase 5: XML-Related Vulnerabilities

6. Phase 6: Broken Access Control

7. Phase 7: Insecure Deserialization

8. Phase 8: API Security Assessment

9. Phase 9: Communication Security

10. Phase 10: Client-Side Vulnerabilities

11. Phase 11: Denial of Service Assessment

12. Phase 12: Server-Side Request Forgery

13. Phase 13: Additional Web Vulnerabilities

14. Phase 14: Mobile and IoT Security

15. Phase 15: Advanced and Zero-Day Threats

16. Vulnerability Categories Summary

17. Critical Security Headers

18. OWASP Top 10 Mapping

19. Common Assessment Challenges

20. Vulnerability Verification Techniques