Bug Bounty - GitBook

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Most Hunters Test the Same Surface as Everyone Else. Most hunters run the same recon tools against the same domains on the same ports and wonder why they get duplicates. The bugs are not on the homepage. They are on the surfaces nobody else is checking: non-standard ports, staging environments, JavaScript files, mobile apps, acquired companies, and internal tooling. Here are 7 surfaces that consistently produce bugs because hunters skip them. Every one of them is findable with free tools and a change in where you point them.

The highest-impact bugs are often hiding in the connections, not the endpoints. #BugBounty

Map the relationships between every asset in scope—shared authentication, cookies, APIs, and trust boundaries.

Individually? Often low severity. Together? Potential account takeover.

A low-impact finding on one asset can become critical when combined with another: • IDOR → User ID disclosure • Open Redirect → OAuth flow abuse • Weak JWT validation → Authentication bypass

@gitbook_s/Stop testing endpoints in isolation. Start thinking in attack chains.

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Bug Bounty - GitBook pinned «@gitbook_s/Hunt for BFLA in GraphQL Mutations, Not Just REST Most hunters focus on REST endpoints for Broken Function-Level Authorization (BFLA) and stop there.»

Before you mark a GraphQL target as "fully tested," spend time reviewing its mutation surface. It often pays off. #BugBounty

GraphQL can hide batch operations, internal tooling, and administrative actions behind a single endpoint. If those mutations trust the client instead of enforcing authorization server-side, you've got a high-value target.

The interesting cases aren't where the UI blocks an action—they're where the backend forgets to enforce the same permission check.