HTTP-Only Cookies for Secure Authentication: Best Practices, Implementation Guide, and Protection Against XSS Attacks
HTTP-Only cookies are a crucial component of secure web authentication. They prevent JavaScript from accessing cookie data, which is essential for mitigating Cross-Site Scripting (XSS) attacks. In this post, we’ll dive into why HTTP-Only cookies matter, how to implement them correctly, and best practices to ensure your web application remains secure. The Problem Imagine this scenario: You’ve built a robust authentication system using session cookies. Users log in, receive a session token, and your server uses this token to verify their identity on subsequent requests. Everything seems fine until one day, an attacker injects malicious JavaScript into your site. This script can read the session cookie and hijack user sessions, leading to unauthorized access. ...