exploiting-idor-vulnerabilities

exploiting-idor-vulnerabilities is a skill for Claude Code from balsm-health/Balsm-AI. It costs 33 tokens per session (2,971 once invoked), scanned A, original, no licence file.

A security-testing guide for finding and safely demonstrating Insecure Direct Object Reference flaws, where changing an ID in a request may expose someone else’s data.

In plain words
What is it for?
It is for penetration tests of APIs and websites, including testing object IDs in URLs and requests.
Why use it?
It helps authorised testers verify whether an application properly checks access to each requested resource.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the balsm-ai plugin — 66 skills, 1 command, 1 agent, 2 hooks, 3 MCP servers shipped together

Good fit It is for penetration tests of APIs and websites, including testing object IDs in URLs and requests.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities
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 balsm-health/Balsm-AI --skill exploiting-idor-vulnerabilities
Clone the repo
git clone --depth 1 https://github.com/balsm-health/Balsm-AI

Made for: Claude Code.

Or install balsm-ai, the plugin that ships this one along with the rest of its 66 skills, 1 command, 1 agent, 2 hooks, 3 MCP servers.

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 exploiting-idor-vulnerabilities

README.md
[![agentmods](https://agentmods.dev/badge/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities/github.svg)](https://agentmods.dev/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities)
Your own site
<a href="https://agentmods.dev/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities"><img src="https://agentmods.dev/badge/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities/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 exploiting-idor-vulnerabilities

Your own site · 80×15
<a href="https://agentmods.dev/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities"><img src="https://agentmods.dev/badge/skills/balsm-health/balsm-ai/exploiting-idor-vulnerabilities.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,971 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.
Origin unknown 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 $0.00033 $0.02971
Opus 5 $0.00016 $0.01486
Sonnet 5 $0.00007 $0.00594
Haiku 4.5 $0.00003 $0.00297

Measured 12d ago against content hash 1abe17d24b0a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

exploiting-idor-vulnerabilities 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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/agent.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/httpie**: For manual request crafting
plugin/skills/exploiting-idor-vulnerabilities/SKILL.md · 310 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 310 lines · 33 tokens per session scan A 1abe17d24b0a

Subscribe to this mod's changes

exploiting-idor-vulnerabilities is a skill published in the GitHub repository balsm-health/Balsm-AI (2 stars, last pushed 1mo ago), with no licence file. It adds 33 tokens to every session and 2,971 once invoked, about $0.0002 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 2026-08-31.

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