Mapping the visible attack surface with Burp Suite - Port Swigger
Summary: PortSwigger's guidance describes mapping an application's visible attack surface - the endpoints explicitly used by the domains under test - before auditing, and recommends setting an initial test scope first. Burp Suite Professional users start an automated crawl via the Scan option on the domain's root node, while Community Edition users manually request grayed-out endpoints in the site map until all in-scope locations have been visited.
Key Takeaway: The grayed-out entries in a site map are endpoints referenced in responses but never requested - and any one of them that goes unvisited is a location that never gets tested.
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