Cross-Site Scripting (XSS) Vulnerability Scanner
Detect Reflected, Stored, and DOM-Based XSS vulnerabilities in modern Single-Page Applications (React, Next.js, Vue) using headless browser execution.
Authorized testing only. Injects non-destructive proof-of-concept markers into DOM sinks.
$ wesecurex-xss --url "https://app.example.com/feed?search=term"
[DOM] Chromium engine rendering client-side React tree
[PROBE] Injected context-aware payload: search=%22%3E%3Csvg%2Fonload%3Dconsole.log(9812)%3E
[PASS] Content-Security-Policy blocked unauthorized script execution
[PASS] Input sanitized before reaching document.querySelector('#results')
[STATUS] Clean: Zero Executable XSS Sinks Identified
Master DOM XSS Sinks & DOMPurify
Read our complete technical guide to preventing XSS across modern frontend applications.
Triage False Positives Efficiently
Techniques to verify real XSS browser sinks and eliminate benign scanner false alarms.
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Frequently Asked Questions
How does WeSecureX test for DOM-based XSS?
WeSecureX renders web pages inside a sandboxed headless Chromium browser environment. The scanner hooks dangerous DOM execution sinks (such as innerHTML, document.write, and eval) and monitors whether injected payloads execute in the client-side JavaScript execution context.
What is the difference between Reflected and Stored XSS?
Reflected XSS occurs when a server immediately mirrors an unescaped query parameter into the response page. Stored XSS occurs when an injected script payload is permanently saved into a database (e.g. in a comment or profile) and executes whenever subsequent visitors view that data.
Does React or Next.js make an application immune to XSS?
No. While JSX automatically escapes variable strings embedded between tags (`<div>{content}</div>`), developers frequently bypass safety by using `dangerouslySetInnerHTML`, evaluating un-sanitized `javascript:` links in `<a href={...}>`, or reading unvalidated parameters into `window.location`.
How can I permanently prevent Cross-Site Scripting?
Use context-aware output encoding, sanitize user-generated rich text with DOMPurify, avoid dangerous innerHTML sinks, and deploy a strict Content Security Policy (CSP Level 3) with per-request nonces.