offensive-business-logic SKILL.md skillA
offensive-business-logic from miosa-osa/osa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add miosa-osa/osa/offensive-business-logic@git:20260913.e13b6b8Pins git:20260913.e13b6b8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- miosa-osa/osa
- Path
priv/skills/offensive-business-logic/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260913.e13b6b8, committed Sep 13, 2026
- Size
- 14,439 bytes
- Repository stars
- 78
- License
- Apache-2.0
Business logic vulnerability testing for web/mobile/API engagements. Covers workflow bypass, state machine violations, multi-step process abuse, price/quantity/discount manipulation, currency confusion, coupon stacking, refund/chargeback abuse, race conditions on logic boundaries, parameter tampering for hidden flows, role/tenant boundary violations, time-of-check vs use, anti-automation defeat, fraud-detection evasion, and subscription/quota abuse. Use when scoping an application after…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Business Logic — Offensive Testing Methodology Business logic flaws are the highest-paying class of vulnerability for bug bounty and the hardest for scanners to detect. They live in the gap between what the developer specified and what an attacker can convince the system to accept. ## Quick Workflow 1. Map every multi-step flow as a state machine (states + allowed transitions + side effects) 2. For each transition, ask: who can call it, in what state, with what inputs, how many times 3. Probe each axis (state, identity, input, frequency) for assumptions 4. Combine flaws — single-axis flaws are usually low severity; chains are critical 5. Quantify financial impact per finding (loss-per-attack × scale) --- ## Reconnaissance — Mapping the Logic ### Build the State Machine For each user flow, draw: - **States**: cart, pending payment, paid, shipped, refunded, cancelled - **Transitions**: which API/UI action, which role, which preconditions - **Side effects**: balance change, inventory change, email, webhook Look for transitions that: - Skip intermediate states (`cart` → `shipped` without `paid`) - Are reversible when they shouldn't be (`shipped` → `cart`) …
Read the whole file at its exact version.
How to install
mdr add miosa-osa/osa/offensive-business-logic@sha256:52bcf0a64dac392eThe line at the top of this page pins the label git:20260913.e13b6b8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lnqe2kitdfwuraip)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 13, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (14439 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
miosa-osa/osa · 78 stars · license Apache-2.0 · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lnqe2kitdfwuraip GET https://markdownregistry.com/api/v1/resolve?ref=miosa-osa/osa/offensive-business-logic GET https://markdownregistry.com/api/v1/blob/52bcf0a64dac392e4e578aa67141aef9881d8c268dcada72a72a9ab785ea69eb
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.