bug-bounty-hunting

bug-bounty-hunting is a skill for Claude Code from 0dayInc/pwn. It costs 26 tokens per session (744 once invoked), scanned A, original, MIT.

A workflow for testing assets listed in a bug-bounty program, where organizations invite security researchers to find and report vulnerabilities.

In plain words
What is it for?
Use it to test HackerOne, Bugcrowd, Synack, or private targets, including authorization problems such as IDOR and broken access control.
Why use it?
It provides a defined process for checking scope, testing authorized targets, ranking findings, and preparing reports.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to test HackerOne, Bugcrowd, Synack, or private targets, including authorization problems such as IDOR and broken access control.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/0dayinc/pwn/bug-bounty-hunting
View source ↗ 0dayInc/pwn
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add 0dayInc/pwn --skill bug-bounty-hunting
Clone the repo
git clone --depth 1 https://github.com/0dayInc/pwn

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for bug-bounty-hunting

README.md
[![agentmods](https://agentmods.dev/badge/skills/0dayinc/pwn/bug-bounty-hunting/github.svg)](https://agentmods.dev/skills/0dayinc/pwn/bug-bounty-hunting)
Your own site
<a href="https://agentmods.dev/skills/0dayinc/pwn/bug-bounty-hunting"><img src="https://agentmods.dev/badge/skills/0dayinc/pwn/bug-bounty-hunting/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for bug-bounty-hunting

Your own site · 80×15
<a href="https://agentmods.dev/skills/0dayinc/pwn/bug-bounty-hunting"><img src="https://agentmods.dev/badge/skills/0dayinc/pwn/bug-bounty-hunting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 744 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high YARA Match · line 37
    YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).
    Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00744
Opus 5 $0.00013 $0.00372
Sonnet 5 $0.00005 $0.00149
Haiku 4.5 $0.00003 $0.00074

Measured 12d ago against content hash bd5af21ac20e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bug-bounty-hunting scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

etc/default_skills/bug-bounty-hunting/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bug Bounty Hunting

Use when the ask is a program (HackerOne, Bugcrowd, Synack, or a private target list): read scope, test in-scope assets, write a report. A listing of documentation/ or a green rspec run is not a program tested.

When to use

  • "test this bounty program"
  • "authz replay / IDOR / broken access control"
  • submit or draft a HackerOne-style report

Methodologies

  • OWASP WSTG + OWASP Top 10 / API Top 10 for the hunt classes
  • Bugcrowd VRT / HackerOne severity for ranking (program table wins)
  • PTES Intelligence Gathering + Vulnerability Analysis, then a short report
  • CWE-284 / CWE-639 / CWE-918 / CWE-79 as the usual bounty labels

Tooling

  • Programs: PWN::WWW::HackerOne, PWN::WWW::BugCrowd, PWN::WWW::Synack and PWN::Plugins::HackerOne for the API.
  • Session + scan: PWN::Plugins::BurpSuite (preferred), ZAP as fallback.
  • Browser: PWN::Plugins::TransparentBrowser through the proxy (devtools: true when the ask needs DOM/network).
  • Authz: PWN::Bounty::LifecycleAuthzReplay on a captured HAR with a second principal.
  • Crawl / API: PWN::Plugins::Spider, PWN::Plugins::OpenAPI.
  • Report: PWN::Reports::*, then the program API if asked to submit.

Procedure

  1. Pull the program page. Write down asset types, wildcards, exclusions, and payout table. That note is evidence, not the finish.
  2. Enumerate in-scope hosts and apps (NmapIt only against those assets, TransparentBrowser + Burp for web).
  3. Map auth: register / login two roles. Save cookies or tokens.
  4. Hunt the usual bounty classes: IDOR, authz, OAuth mix-ups, SSRF, stored XSS, cache deception, business logic. Prefer Burp active scan on the mapped site map, then manual replay.
  5. Authz pass: LifecycleAuthzReplay.start(har_path:, replay_as:, proxy:).
  6. For each finding: minimal request/response pair, impact, CWE, fix hint.
  7. If asked to file: PWN::Plugins::HackerOne (or the program's form) with that evidence. Close the browser when done.

Read the full file on GitHub · 71 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 71 lines · 26 tokens per session scan A bd5af21ac20e

Subscribe to this mod's changes

bug-bounty-hunting is a skill published in the GitHub repository 0dayInc/pwn (82 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 744 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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