Phase 4

x8 — Very Fast Alternative to ffuf

A fast alternative to ffuf for parameter fuzzing — written in Rust

Parameter FuzzingRust

Installation

#1 Install x8 via Cargo (Rust)

cargo install x8

#2 Verify installation

x8 -h

Basic Usage

#3 Basic parameter fuzzing with x8

x8 -u "https://site.com/endpoint?FUZZ=test" -w paramnames.txt

#4 Filter specific status codes

x8 -u "https://site.com/api?param=FUZZ" -w values.txt --filter-status 200,403

#5 High-speed fuzzing with 50 threads

x8 -u "https://site.com/endpoint" -w params.txt -t 200 --threads 50

Key Options

-u

Target URL (with FUZZ)

-w

Wordlist file

-t

Concurrent requests count

--threads

Number of execution threads

--filter-status

Filter by status codes

-m

Request method (GET/POST)

-j

JSON output

-d

Add POST data

-H

Add custom headers

--help

Show help

When to use x8?

When you need to scan parameters at high speed

As a fast alternative to ffuf for parameter fuzzing

To scan a large number of URLs in a short time

When using it with Arjun for comprehensive coverage

In high-performance computing with multiple threads

Notes & Tips

10-100x faster than ffuf in some scenarios

Supports automatic updates: x8 --self-update

Supports multiple URLs via -l or stdin

Compatible with standard wordlists used with ffuf

Supports both GET and POST methods

Consumes fewer resources as it's written in Go

Can be combined with gf to filter results

Suitable for quick scanning in the initial reconnaissance phase

Common Errors & Solutions

no response from the target

Make sure the server is running and the URL is correct

rate limiting / 429 Too Many Requests

Reduce the number of threads or add --delay

panic: runtime error

A processing error occurred — check the input and verify the URL

wordlist file not found

Check the wordlist file path and use a full path if needed

Phase 4

x8 — Very Fast Alternative to ffuf

A fast alternative to ffuf for parameter fuzzing — written in Rust

Parameter FuzzingRust

Installation

#1 Install x8 via Cargo (Rust)

cargo install x8

#2 Verify installation

x8 -h

Basic Usage

#3 Basic parameter fuzzing with x8

x8 -u "https://site.com/endpoint?FUZZ=test" -w paramnames.txt

#4 Filter specific status codes

x8 -u "https://site.com/api?param=FUZZ" -w values.txt --filter-status 200,403

#5 High-speed fuzzing with 50 threads

x8 -u "https://site.com/endpoint" -w params.txt -t 200 --threads 50

Key Options

-u

Target URL (with FUZZ)

-w

Wordlist file

-t

Concurrent requests count

--threads

Number of execution threads

--filter-status

Filter by status codes

-m

Request method (GET/POST)

-j

JSON output

-d

Add POST data

-H

Add custom headers

--help

Show help

When to use x8?

When you need to scan parameters at high speed

As a fast alternative to ffuf for parameter fuzzing

To scan a large number of URLs in a short time

When using it with Arjun for comprehensive coverage

In high-performance computing with multiple threads

Notes & Tips

10-100x faster than ffuf in some scenarios

Supports automatic updates: x8 --self-update

Supports multiple URLs via -l or stdin

Compatible with standard wordlists used with ffuf

Supports both GET and POST methods

Consumes fewer resources as it's written in Go

Can be combined with gf to filter results

Suitable for quick scanning in the initial reconnaissance phase

Common Errors & Solutions

no response from the target

Make sure the server is running and the URL is correct

rate limiting / 429 Too Many Requests

Reduce the number of threads or add --delay

panic: runtime error

A processing error occurred — check the input and verify the URL

wordlist file not found

Check the wordlist file path and use a full path if needed