business-logic-vulnerabilities

business-logic-vulnerabilities is a skill for Claude Code, Codex from ok-helloworld/vibe-pentest. It costs 37 tokens per session (7,610 once invoked), scanned A, original, AGPL-3.0.

A playbook for finding business-logic vulnerabilities: mistakes in an application's workflows, rules, permissions, or state changes. It covers race conditions, price manipulation, coupon abuse, state machines, and multi-step authorisation gaps.

In plain words
What is it for?
It is for analysing checkout and pricing flows, coupons, multi-step workflows, concurrent requests, state transitions, and permissions across related actions.
Why use it?
It helps identify abuse paths that depend on the order or combination of valid actions, rather than on a simple technical error. These flaws can allow users to bypass rules, change prices, or reach unauthorised states.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It is for analysing checkout and pricing flows, coupons, multi-step workflows, concurrent requests, state transitions, and permissions across related actions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ok-helloworld/vibe-pentest/business-logic-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 ok-helloworld/vibe-pentest --skill business-logic-vulnerabilities
Clone the repo
git clone --depth 1 https://github.com/ok-helloworld/vibe-pentest

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 business-logic-vulnerabilities

README.md
[![agentmods](https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/business-logic-vulnerabilities/github.svg)](https://agentmods.dev/skills/ok-helloworld/vibe-pentest/business-logic-vulnerabilities)
Your own site
<a href="https://agentmods.dev/skills/ok-helloworld/vibe-pentest/business-logic-vulnerabilities"><img src="https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/business-logic-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 business-logic-vulnerabilities

Your own site · 80×15
<a href="https://agentmods.dev/skills/ok-helloworld/vibe-pentest/business-logic-vulnerabilities"><img src="https://agentmods.dev/badge/skills/ok-helloworld/vibe-pentest/business-logic-vulnerabilities.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,610 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 warn 7 Sept 2026
SkillSpector: 3 findings, 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 Privilege Escalation · line 688
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • medium analysis-evasion · line 1
    Suspicious Unicode normalization or mixed-script content
    Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
  • medium Excessive Agency · line 303
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00037 $0.07610
Opus 5 $0.00018 $0.03805
Sonnet 5 $0.00007 $0.01522
Haiku 4.5 $0.00004 $0.00761

Measured 13d ago against content hash 2e0d71b5d53f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

business-logic-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 13d 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.

For each hit, replay the URL anonymously (curl, VLC, flv.js demo at `https://bilibili.github.io/flv.js/demo/`). If the URL plays without a session, you've broken VIP gating. Defense: use signed, short-TTL URLs bound to u
references/pentest_skills/business-logic-vulnerabilities/SKILL.md · 711 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 13d ago First seen · 711 lines · 37 tokens per session scan A 2e0d71b5d53f

Subscribe to this mod's changes

business-logic-vulnerabilities is a skill published in the GitHub repository ok-helloworld/vibe-pentest (319 stars, last pushed 3d ago), licensed AGPL-3.0. It adds 37 tokens to every session and 7,610 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 2026-08-30.

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