hunt-idor

hunt-idor is a skill for Claude Code, Codex from Encod3d-Sec/TORCH. It costs 112 tokens per session (2,505 once invoked), scanned A, original, MIT.

A guide for finding IDOR, also called broken object-level authorization. This happens when changing an object identifier lets one user access another user's data or actions.

In plain words
What is it for?
Use it to test user records, invoices, reports, messages, organization members, GraphQL objects, cross-tenant access, and unauthorized write or delete operations.
Why use it?
It helps check whether the server verifies ownership instead of trusting IDs supplied by the client, including IDs hidden in URLs, APIs, or GraphQL requests.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to test user records, invoices, reports, messages, organization members, GraphQL objects, cross-tenant access, and unauthorized write or delete operations.

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Install with agentmods
npx agentmods add skills/encod3d-sec/torch/hunt-idor
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 Encod3d-Sec/TORCH --skill hunt-idor
Clone the repo
git clone --depth 1 https://github.com/Encod3d-Sec/TORCH

Made for: Claude Code, Codex.

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 hunt-idor

README.md
[![agentmods](https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-idor/github.svg)](https://agentmods.dev/skills/encod3d-sec/torch/hunt-idor)
Your own site
<a href="https://agentmods.dev/skills/encod3d-sec/torch/hunt-idor"><img src="https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-idor/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 hunt-idor

Your own site · 80×15
<a href="https://agentmods.dev/skills/encod3d-sec/torch/hunt-idor"><img src="https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-idor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,505 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
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 $0.00112 $0.02505
Opus 5 $0.00056 $0.01252
Sonnet 5 $0.00022 $0.00501
Haiku 4.5 $0.00011 $0.00250

Measured 9d ago against content hash aee09e0ee813, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

hunt-idor scanned grade A 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 9d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -H "Cookie: session=USER_A" https://target.com/api/v1/invoices/12345
skills/hunt/hunt-idor/SKILL.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hunt: IDOR / Broken Object Level Authorization

Assumes hunt-core for the scope gate, two-account rule, confirmation gate, enumeration limits, stop conditions, wiki protocol, FIND output, and Deadends. Do not re-derive any of that here.

Wiki

qmd_query "IDOR BOLA insecure direct object reference access control" via wiki-search MCP

Hub: [[web-moc]] (live web index). Primary page: [[access-control]]. Payload arsenal: wiki/payloads/idor.md. Anchors: [[uuid-insecurities]] (v1-UUID timestamp/MAC when an object ID is a UUID rather than a sequential integer), [[jwt-attacks]] (chain a trusted sub/user_id claim to ATO, hand off to hunt-auth).

Attack surface signals

URL patterns: /api/v1/users/{id}, /invoices?id=, /reports/{uuid}/, /messages/{thread_id}, /admin/orgs/{org_id}/members

GraphQL: any query or mutation taking an id argument. Check for node(id: "...") global lookups - one endpoint reaching every object type, with per-type authorization frequently missing on at least one.

Rank before testing. Not all endpoints are equally likely:

  • Newest features - middleware follows codebase conventions; a feature written outside them misses it.
  • Bulk and export endpoints - one request, many objects, much higher severity per finding.
  • Anything carrying two identifiers - see the trusted-identifier test below.
  • Cross-service internal calls - the internal hop often carries no user context at all.
  • File and document access - frequently a separate host or CDN with no authorization beyond knowing the ID.
  • Non-GET verbs on read-looking endpoints - GET /orders/123 authorized, PATCH not.

Where the identifiers are

Check all of these; the least obvious are the least protected. Path segments, query parameters, request bodies (including nested objects), headers (X-User-Id, X-Account-Id, X-Tenant-Id), cookies, JWT claims, GraphQL variables, WebSocket messages, and file/CDN URLs.

Get B's identifiers from B. Log in as B and read them from B's own traffic, profile page, or JWT. Record in identities.md. Never obtain an identifier by incrementing until you find out whose it is - that is enumerating real users.

Read the full file on GitHub · 214 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. 9d ago First seen · 214 lines · 112 tokens per session scan A aee09e0ee813

Subscribe to this mod's changes

hunt-idor is a skill published in the GitHub repository Encod3d-Sec/TORCH (318 stars, last pushed 8d ago), licensed MIT. It adds 112 tokens to every session and 2,505 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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