Introducing DOM Invader: DOM XSS just got a whole lot easier to find
Summary: PortSwigger released DOM Invader, a new tool for Burp Suite Professional and Community Edition 2021.7 on the Early Adopter channel, implemented as an extension in the embedded browser that instruments the target's DOM to intercept JavaScript sources and sinks. The tool provides an Augmented DOM tree view, uses customizable canary strings to trace where input reaches a sink, and includes a Postmessage tab for viewing, reissuing, and spoofing the origin of web messages.
Bottom line: DOM-based XSS is described as by far the most difficult of the three XSS types to find and exploit, and PortSwigger says it struck gold on a well-known bug bounty program, finding a PayPal DOM XSS, while testing the tool's functionality.
Read the original at PortSwigger Research ↗
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