Collected research

XSS-Track as a HTML5 WebSockets traffic sniffer

Kotowicz extends XSS-Track so one injected script sniffs HTML5 WebSocket traffic. It wraps window.WebSocket, replacing the constructor and prototype.send and attaching a message listener, so every frame sent and received is logged to the attacker's backend - showing ws:// is no safe channel for private data on a page with any XSS.

Record

Published by

blog.kotowicz.net

Topic

XSS

In the archive

• Collected in the 2011 research round

Related sources

• XSS-Track WebSockets proxy

Tags

• websocket
• xss
• javascript
• info-leak
• tooling
• dom
• owasp-a03-2021

This page is the archive's own catalogue record. The research is the work of blog.kotowicz.net, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 10 August 2026.