A comprehensive overview of the top 10 JavaScript security vulnerabilities affecting both frontend and backend applications. Covers XSS, prototype pollution, insecure deserialization, CSRF, NoSQL injection, ReDoS, directory traversal, vulnerable dependencies, malicious npm packages, and hardcoded secrets. Each vulnerability includes real-world CVE examples, attack scenarios, and concrete mitigation strategies. The post also highlights how SAST, dependency scanning, and secrets detection tools can catch these issues early in the development pipeline.
Table of contents
1. Cross-Site Scripting (XSS) Attacks2. Prototype Pollution3. Insecure Deserialization4. Cross-Site Request Forgery (CSRF)5. NoSQL Injection6. Regular Expression Denial of Service (ReDoS)7. Directory Traversal & File Exposure8. Vulnerable and Outdated Dependencies9. Malicious NPM Packages and Supply Chain Attacks10. Hardcoded Secrets and Exposed CredentialsConclusionSort: