# PentestPad/subzy

Subdomain takeover vulnerability checker

Repository: https://github.com/PentestPad/subzy
Canonical: https://ross.abutalabs.com/products/subzy
Homepage: https://www.pentestpad.com
Language: Go
License: GPL-2.0
License Family: copyleft
Topics: cybersecurity, bugbounty, security-vulnerability, subdomain-takeover, security-research
Last push: 2024-09-10T13:59:44+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": 2742, "days_push": 722, "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 1589, forks 203 (observed 2026-08-28T04:05:08.091391+00:00)

## What it is
Subzy is a Go-based command-line tool that checks subdomains for takeover vulnerabilities by matching HTTP response fingerprints from the can-i-take-over-xyz project. It accepts single targets or lists of subdomains and reports which ones are vulnerable to takeover.

## Use cases
- check if a subdomain is vulnerable to takeover
- scan a list of subdomains for dangling DNS entries
- find exploitable subdomains during a bug bounty
- verify takeover risk after decommissioning cloud services
- audit attack surface for unclaimed third-party integrations

## When to choose
- you need a fast, single-purpose subdomain takeover checker
- you want fingerprint-based detection from can-i-take-over-xyz
- you work in Go and want a simple go install workflow

## When to avoid
- you need full DNS enumeration or subdomain discovery (use amass or subfinder first)
- you need a full vulnerability scanner rather than a takeover-specific check
- you want a GUI or managed reporting platform

## Facets
- artifact type: cli-tool
- maturity: active
- function: security, http-client, cli
- domain: security, penetration-testing, developer-tools
- platform: windows, cli, cross-platform
- tags: subdomain-takeover, bug-bounty, vulnerability-scanning, go, recon, linux, macos

## Member repositories
- PentestPad/subzy (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:08.091391+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 2026-08-30T03:54:49.726360+00:00, confidence not recorded.
  - readme: https://github.com/PentestPad/subzy (fetched 2026-08-28T04:05:08.091391+00:00, sha 2aaa3541b6b6)
  - homepage: https://www.pentestpad.com (fetched 2026-08-29T11:25:37.305024+00:00, sha 80a4c5ac3596)
  - site_page: https://www.pentestpad.com/features (fetched 2026-08-29T11:25:37.314076+00:00, sha 5c4b41dcf6da)
  - site_page: https://www.pentestpad.com/about (fetched 2026-08-29T11:25:37.350228+00:00, sha 005235758cb3)
  - site_page: https://www.pentestpad.com/features?tab=automated-pentest-report-generation (fetched 2026-08-29T11:25:37.360123+00:00, sha 5c4b41dcf6da)
  - site_page: https://www.pentestpad.com/features?tab=client-portal-transparency (fetched 2026-08-29T11:25:37.362206+00:00, sha 5c4b41dcf6da)
  - site_page: https://www.pentestpad.com/docs (fetched 2026-08-29T11:25:37.364055+00:00, sha d27950c8597a)
  - site_page: https://www.pentestpad.com/pricing (fetched 2026-08-29T11:25:37.316278+00:00, sha d1ef5d631af4)
  - site_page: https://www.pentestpad.com/faq (fetched 2026-08-29T11:25:37.318473+00:00, sha c2335e8052c7)
  - site_page: https://www.pentestpad.com/pentest-pricing-calculator (fetched 2026-08-29T11:25:37.365938+00:00, sha fca7cf98703c)
- Data as of 2026-08-30T08:39:29.467469+00:00.