ffuf
Fast web fuzzer written in Go for recursive directory discovery, content enumeration, and brute force scans of HTTP request parameters at scale.
Technical Architecture & Overview
ffuf is a fast web fuzzer written in Go. It tests many values from one or more wordlists against HTTP endpoints to find hidden directories, files, and parameters. The tool supports recursion, output filters, rate limits, and custom headers to fit a range of audit workflows.
Targeted Technical Use Cases
Use ffuf to map hidden attack surface, validate routing, and verify that non-public endpoints do not leak sensitive resources.
Evaluation & Trade-offs
Core Strengths
- +Runs many concurrent HTTP requests against a target, with 40 threads by default.
- +Supports recursion, output filters, and multiple wordlist modes in one command.
- +Can send traffic through an HTTP or SOCKS5 proxy and replay matched requests to a proxy for follow-up review.
Trade-Offs & Limitations
- -Can produce false positives when server responses are inconsistent, unless filters or auto-calibration are tuned.
- -Requires a curated wordlist for effective coverage of a target.
Defensive Security Application
Use ffuf during authorized reconnaissance to find accidentally exposed endpoints and confirm that sensitive routes are not reachable from the public internet.
Frequently Asked Questions
What is ffuf?→
ffuf is a fast web fuzzer written in Go. It tests many values from one or more wordlists against HTTP endpoints to find hidden directories, files, and parameters. The tool supports recursion, output filters, rate limits, and custom headers to fit a range of audit workflows.
What is ffuf used for?→
Use ffuf to map hidden attack surface, validate routing, and verify that non-public endpoints do not leak sensitive resources.
What are the strengths of ffuf?→
- +Runs many concurrent HTTP requests against a target, with 40 threads by default.
- +Supports recursion, output filters, and multiple wordlist modes in one command.
- +Can send traffic through an HTTP or SOCKS5 proxy and replay matched requests to a proxy for follow-up review.
What are the limitations of ffuf?→
- +Can produce false positives when server responses are inconsistent, unless filters or auto-calibration are tuned.
- +Requires a curated wordlist for effective coverage of a target.
How is ffuf used defensively?→
Use ffuf during authorized reconnaissance to find accidentally exposed endpoints and confirm that sensitive routes are not reachable from the public internet.