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SQL injection | XSS | CSRF | JWT| CORS | XXE | SSRF | Clickjacking | DOM-based vulnerability | HTTP Request Smuggling | OS Command Injection | Service Side Template Injection | Directory Traversal | Access Control Vulnerability | Authentication | Web Sockets | Web Cache Poisoning | Insecure Deserialisation | Information Disclosure | Business Login Vulnerability | HTTP host header Attack | OAuth Authentication | File Upload Vulnerability | Essential Skills | Prototype Pollution.