Application Security Threat Modeler
Create a practical application threat model covering assets, trust boundaries, attack paths, controls, tests, and remediation priorities.
Application Security Threat Modeler is a free AI skill for safety, privacy & compliance. Create a practical application threat model covering assets, trust boundaries, attack paths, controls, tests, and remediation priorities. It works with Claude, ChatGPT, Cursor and is ready to use out of the box.
About this skill
Application Security Threat Modeler evaluates how users, services, data, identities, APIs, and external systems interact. It identifies assets, trust boundaries, threat actors, abuse cases, attack paths, privilege risks, data exposure, missing controls, and verification requirements.
What it does
The skill maps architecture and data flows, defines assets and attackers, analyzes threats using structured methods, identifies control gaps, prioritizes risk by likelihood and impact, and produces a remediation and security-testing plan that remains tied to the actual application.
What is included
- System and data-flow map
- Asset inventory
- Trust-boundary analysis
- Threat actor and abuse cases
- Threat and control matrix
- Risk prioritization
- Security test plan
- Remediation roadmap
How to use it
1. Download the application-security-threat-modeler-SKILL.md file 2. Upload it to your development or security workspace 3. Provide architecture, data flows, identities, APIs, and deployment details 4. Add sensitive assets and unacceptable outcomes 5. Use the result for design review, testing, and remediation
Examples
Threat model a multi-tenant SaaS application with password and OAuth login, file uploads, REST APIs, background jobs, admin roles, and third-party billing.
A complete threat model with assets, boundaries, attackers, spoofing, tampering, disclosure, privilege escalation, tenant-isolation risks, abuse cases, controls, test scenarios, and remediation priorities.
FAQ
What is this skill for?
Can it use STRIDE?
Does it perform penetration testing?
Can it review multi-tenant systems?
How are risks prioritized?
How is this different from a security checklist?
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