chain-idor-to-priv-esc

chain-idor-to-priv-esc is a skill for Claude Code, Codex from PurpleAILAB/Decepticon. It costs 24 tokens per session (126 once invoked), scanned A, original, Apache-2.0.

A playbook for testing whether an insecure direct object reference, or IDOR, can lead to higher privileges. IDOR means accessing another user's object by changing an identifier without proper permission checks.

In plain words
What is it for?
It covers changing another user's sensitive data, escalating permissions, obtaining recovery tokens, and verifying the resulting privileged action.
Why use it?
It helps connect an authorization flaw to a confirmed administrative action.

Skill for Claude CodeCodex

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

Good fit It covers changing another user's sensitive data, escalating permissions, obtaining recovery tokens, and verifying the resulting privileged action.

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Install with agentmods
npx agentmods add skills/purpleailab/decepticon/idor-to-priv-esc
About the project

Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.

PurpleAILAB/Decepticon · 5,491 stars · on GitHub · decepticon.red

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 PurpleAILAB/Decepticon --skill idor-to-priv-esc
Clone the repo
git clone --depth 1 https://github.com/PurpleAILAB/Decepticon

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 chain-idor-to-priv-esc

README.md
[![agentmods](https://agentmods.dev/badge/skills/purpleailab/decepticon/idor-to-priv-esc/github.svg)](https://agentmods.dev/skills/purpleailab/decepticon/idor-to-priv-esc)
Your own site
<a href="https://agentmods.dev/skills/purpleailab/decepticon/idor-to-priv-esc"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/idor-to-priv-esc/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 chain-idor-to-priv-esc

Your own site · 80×15
<a href="https://agentmods.dev/skills/purpleailab/decepticon/idor-to-priv-esc"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/idor-to-priv-esc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 126 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 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 $0.00024 $0.00126
Opus 5 $0.00012 $0.00063
Sonnet 5 $0.00005 $0.00025
Haiku 4.5 $0.00002 $0.00013

Measured 9d ago against content hash 9aade412b4ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

chain-idor-to-priv-esc 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 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.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

packages/decepticon/decepticon/skills/standard/analyst/chains/idor-to-priv-esc/SKILL.md · 18 lines

What it actually says

Chain: IDOR to Privilege Escalation

Canonical path

  1. IDOR modifies another user's sensitive object.
  2. Escalate role/permissions or steal recovery token.
  3. Perform admin-level action and show impact.

Validation

Demonstrate before/after authorization state and downstream privileged action evidence.

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 · 18 lines · 24 tokens per session scan A 9aade412b4ac

Subscribe to this mod's changes

chain-idor-to-priv-esc is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,491 stars, last pushed 13d ago), licensed Apache-2.0. It adds 24 tokens to every session and 126 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 2026-09-03.