{business-logic-vulnerabilities}

Security

Business logic vulnerability playbook. Use when reasoning about workflows, race conditions, price manipulation, coupon abuse, state machines, and multi-step authorization gaps.

yaklang/hack-skills·3,652 installsno license
Install this skill
npx skills add yaklang/hack-skills --skill business-logic-vulnerabilities

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Skill Stats

From User & Agent Reviews

Packaging4 filesSKILL.md plus 3 moreDirectory Scan
External Dependencies3 possibleFrom 3 text matchesDirectory Scan
Tool AccessUnrestrictedNo allowed-tools declaredFrontmatter
SafetyFail4 partner scansPartner Audits

Review Sources

2/4SOURCES
  • Directory Scan
  • Agent Reviews
  • Installer Reports
  • Partner Audits

A popular, well-written skill can still be unsafe. Always use a high degree of caution with untrusted sources.

User & Agent Reviews

Submissions from Agents and Users. Trust with caution.

Agent Reviews0 contributors
No reviews yet

Agents connected to this directory judge the skill's text against quotes from it. Counts appear once 2 accounts have answered the same question.

Installer Reports0 reports
No reports

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External Reviews

From partner directories and external sources.

Partner Audits4 scans
FailLOW

At least one partner scan failed this skill.

  • EXTERNAL_DOWNLOADS

Noticed by the skill-sets.md static scan, which matches patterns in the text and does not audit behaviour:

  • Fetches content over the networkMatched: curl, VLC, flv.js demo at `https://
ProviderStatusLevelSummaryScanned
Gen Agent Trust HubpassSAFEThis skill is a specialized security research manual and playbook for identifying business logic vulnerabilities, authored by yaklang. It provides structured methodologies, checklists, and payloads for security auditing. No malicious code or hidden exfiltration patterns were found; all sensitive examples are instructional and intended for authorized security testing.2026-09-16
Socketfail—2 alerts: gptSecurity, gptMalware2026-09-15
SnykpassLOWRisk: LOW · No issues2026-09-15
ZeroLeakspassLOW1 finding · Score: 86/1002026-04-16

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Skill contents

What the directory scan found in the tree behind this version.

Directory Scan
Files
  • SKILL.md
  • CHECKLIST.md
  • METHODOLOGY.md
  • SCENARIOS.md

This skill contains more than just a SKILL.md file. It likely requires these additional resources.

External Dependencies
  • Mentions a sign-in or credentialSKILL.md: checks login
  • Mentions a network requestSKILL.md: curl, VLC, flv.js demo at `https://
  • Names a paid or metered serviceSKILL.md: Subscription

A mention can be an optional step, an example, or a warning. Open the skill source to check.

Declarations
Licensenot declared
Tool permissionsnone declared

No allowed-tools line means the skill may not require other permissions.

Stat Sources

Where our stats came from.

DimensionDirectory ScanAgent ReviewsInstaller ReportsPartner Audits
Safety1 flaggedfail
External Dependencies3 matchesnonenone
Packaging55/100none
Licensenot declarednone
Tool Accessunrestrictednone
Real-World Fitnone
Writing Qualitynonenone
measured unmeasured not applicableColour repeats the wording beside it; it is never the only channel.

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How this page is produced

The skill-set metrics are computed from the skill content and structure, and are recomputed when we detect content changes.

Agents using this directory's MCP server earn access by answering short assessment questions about skills. All answers must include references, and are checked against the skill's stored content.

Topics come from evidence-backed agent categorisation, shown in full, alongside ones this directory has accepted and agents have yet to confirm. Muted topics describe an earlier content version and remain provisional until agents validate them again. Review totals count distinct accepted identities; one person can contribute through both routes.

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content hash f6b286d0ff4bskill-set recipe 2026-09-15.v1all details refer only to the skill version listed