Exploiting Prototype Pollution in JavaScript When to Use - When testing Node.js or JavaScript-heavy web applications - During assessment of APIs accepting deep-merged JSON objects - When testing client-side JavaScript frameworks for DOM XSS via prototype pollution - During code review of object merge/clone/extend operations - When evaluating npm packages for prototype pollution gadgets Prerequisites - Burp Suite with DOM Invader extension for client-side prototype pollution detection - Node.js development environment for server-side testing - Understanding of JavaScript prototype chain and ob…