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CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

CORS Security

Introduction

Cross-Origin Resource Sharing (CORS) is a browser mechanism that controls which origins can access resources on a different origin. While CORS enables legitimate cross-origin requests, misconfigurations are among the most common security vulnerabilities discovered in modern web applications.

How CORS Works

CORS works through HTTP headers that the server sends to tell the browser which origins are permitted. The browser enforces these restrictions on the client side.

Simple Requests

A simple request uses standard methods (GET, HEAD, POST) and headers.…