Recon Skills is a pack of security-testing skills covering reconnaissance, web applications, APIs, authentication, vulnerability validation, cloud infrastructure, and reporting. Security professionals use it for authorized assessments of systems they own or have written permission to test. The catalogue entries are individual skills from the pack.
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.
npx skills add uphiago/recon-skills --skill hunt-business-logicgit clone --depth 1 https://github.com/uphiago/recon-skillsWrote 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.
[](https://agentmods.dev/skills/uphiago/recon-skills/hunt-business-logic)<a href="https://agentmods.dev/skills/uphiago/recon-skills/hunt-business-logic"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/hunt-business-logic/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.
<a href="https://agentmods.dev/skills/uphiago/recon-skills/hunt-business-logic"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/hunt-business-logic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00119 | $0.05007 |
| Opus 5 | $0.00060 | $0.02504 |
| Sonnet 5 | $0.00024 | $0.01001 |
| Haiku 4.5 | $0.00012 | $0.00501 |
Grade D, and why
hunt-business-logic scanned grade D with 3 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 8d 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
curl --max-time 30 --connect-timeout 10 -s -X POST "https://httpbin.org/post" -H "Content-Type: application/json" -d '{"quantity":-1,"price":0}' | python3 -m json.tool 2>/dev/null | grep -q "quantity" && echo "PASS" || e Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl --max-time 30 --connect-timeout 10 -s -X POST "https://httpbin.org/post" -H "Content-Type: application/json" -d '{"quantity":-1,"price":0}' | python3 -m json.tool 2>/dev/null | grep -q "quantity" && echo "PASS" || e Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl --max-time 30 --connect-timeout 10 -s -X POST https://target.com/api/subscribe \ How it starts
The opening of the file, as written. The whole thing — 315 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crown Jewel Targets
Business logic vulnerabilities pay highest in platforms where financial transactions, identity verification, and access controls intersect with real-world consequences. The richest targets are:
- E-commerce & payment platforms (Valve/Steam, Shopify) — payment flow manipulation, free goods, price tampering
- Marketplace & gig economy apps (Airbnb, Uber) — identity/verification bypass enabling fraud or unsafe interactions
- SaaS with tiered access (Mozilla Monitor) — bypassing verification to unlock monitoring features without entitlement
- High-traffic consumer apps (Snapchat, Yelp) — rate-limit bypass enabling spam, enumeration, or abuse at scale
Asset types that pay: checkout flows, subscription endpoints, callback/verification systems, webhook handlers, employee/internal portals exposed to the internet, and any endpoint that trusts client-supplied data to make authorization decisions.
Attack Surface Signals
URL patterns to watch:
/checkout,/order,/subscribe,/payment,/verify,/confirm,/callback/internal,/employee,/summit,/staff,/admin— internal pages accidentally public/api/v*/payment,/api/v*/notify,/webhook— payment provider callbacks- Endpoints accepting
X-Forwarded-For,X-Real-IP,CF-Connecting-IPheaders
Response/header signals:
Set-Cookiewith unvalidated session state tied to cart or order data- Payment provider names in responses:
Smart2Pay,Stripe,PayPal,Braintree - Redirect chains through third-party payment pages (in-flight data opportunity)
200 OKon subscription/verification endpoints with no CAPTCHA or token
JS patterns:
- Hardcoded internal URLs in frontend bundles (
/employee/,/staff/,/internal/) - Client-side price calculation before server submission
- Verification logic that only checks on the frontend (
if (verified) { ... }) fetch('/api/subscribe', { method: 'POST', body: ... })with no anti-CSRF token or rate-limit token
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.
- 8d ago First seen · 315 lines · 119 tokens per session scan D 64c017c5ca77
hunt-business-logic is a skill published in the GitHub repository uphiago/recon-skills (1,254 stars, last pushed 10d ago), licensed MIT. It adds 119 tokens to every session and 5,007 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it D with 3 findings (sends data to an external url, downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
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