# Dheerajmadhukar/4-ZERO-3

403/401 Bypass Methods + Bash Automation + Your Support ;)

Repository: https://github.com/Dheerajmadhukar/4-ZERO-3
Canonical: https://ross.abutalabs.com/products/4-zero-3
Language: Shell
License: MIT
License Family: permissive
Last push: 2022-06-06T21:51:50+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2015, "days_push": 1549, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1667, forks 308 (observed 2026-08-28T04:05:19.632305+00:00)

## What it is
4-ZERO-3 is a Bash-based security testing script that automates a wide range of techniques for bypassing HTTP 403/401 access restrictions on web endpoints. It supports header, protocol, port, HTTP method, URL encoding, and SQLi/WAF bypass payload categories, printing cURL payloads for any successful bypass.

## Use cases
- bypass 403 forbidden errors on a target URL
- test 401 unauthorized endpoints with alternate headers and methods
- automate WAF and mod_security bypass attempts during pentests
- check if a secret endpoint is accessible via protocol or port tricks
- generate cURL payloads for access control testing
- run a full exploit scan against a restricted path during bug bounty recon

## When to choose
- you are doing authorized penetration testing or bug bounty recon on web endpoints
- you want a quick, dependency-light Bash tool that only needs curl
- you need to enumerate many 403/401 bypass techniques in one automated run

## When to avoid
- you do not have authorization to test the target system
- you need a full-featured web vulnerability scanner rather than a focused bypass tool
- you require a maintained tool with recent updates and active issue support
- you need a GUI or non-Bash environment such as Windows without a POSIX shell

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: penetration-testing, http-client, security, cli
- domain: security, penetration-testing, web-development
- platform: cli
- tags: 403-bypass, 401-bypass, waf-bypass, bug-bounty, recon, curl, bash-script, offensive-security, command-line, linux, macos

## Member repositories
- Dheerajmadhukar/4-ZERO-3 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:19.632305+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:42:51.673299+00:00, confidence not recorded.
  - readme: https://github.com/Dheerajmadhukar/4-ZERO-3 (fetched 2026-08-28T04:05:19.632305+00:00, sha 8f4358541165)
- Data as of 2026-08-30T08:39:29.467469+00:00.