5 Security Layers Every Frontend Dev Needs

Your frontend app may not be as secure as you think. Learn how to secure your React app layer by layer, from XSS to auth to npm supply chain, using AWS Cognito, IAM, and WAF. Frontend security lives in layers. The security world calls this defense in depth: stack enough walls that getting past one doesn't hand someone the whole app. I built a React app with four real vulnerabilities, popped an XSS alert in 10 seconds, and then fixed each one layer by layer. AWS blog: https://go.aws/4bo9XBN Code repo: https://go.aws/4y1qRQk Amazon Cognito: https://go.aws/4wdIeMi AWS WAF: https://go.aws/4y1qS6Q Agent Toolkit for AWS: https://go.aws/4y1qSUo Follow AWS Developers! 🆇 X: https://go.aws/4wdeWx6 💼 LinkedIn: https://go.aws/4eHGIMs 0:00 Your Frontend Isn't As Secure As You Think 0:37 Defense in Depth (Security in Layers) 1:11 Layer 1: Cross-Site Scripting (XSS) 2:11 The Fix: Stop Using dangerouslySetInnerHTML 2:59 Layer 2: Authentication + Authorization 3:41 Why Hiding a Button Isn't Security 4:52 Layer 3: Secrets in the Browser 5:47 Layer 4: Dependencies (npm Packages) 6:59 AI Agent Skills Are Dependencies Too 7:44 AWS WAF at the Edge 8:39 Conclusion #AWS #AmazonCognito #AWSWAF