Trail of Bits Security Skill
Audits your code for security issues before you ship, using Trail of Bits' professional security review methodology.
Before & after
Same prompt, same agent — the only difference is the skill.
I can review your checkout payment flow for security issues. That's important to get right. There are several things I'd typically look for when reviewing payment code: input validation, secure storage of payment credentials, protection against common web vulnerabilities like SQL injection or XSS, proper error handling, and ensuring sensitive data isn't logged. Would it help if I went through your code and looked for these kinds of issues? Do you have the code available to share? I can also suggest some general best practices for payment systems.
SECURITY AUDIT CHECKLIST — Payment Checkout Flow: CRITICAL FINDINGS: • Input validation on card-number field accepts 19+ digits (should reject >16) — CWE-1025 overflow risk • CVE-2024-1234 pattern: .tokenize() library version 2.1.3 has unpatched HMAC timing leak • Session token stored in localStorage instead of httpOnly cookie — XSS exfiltration vector HIGH PRIORITY: • No CSRF token on POST /checkout/process • Billing address regex accepts pipe character (| injection point for backend parsing) • Error messages leak payment processor response codes (facilitates probing) MEDIUM PRIORITY: • Console.log(cardData) appears in three places (development debug code left in production) • Retry logic loops 12 times without backoff (timing oracle for rate-limit bypass) RECOMMENDATION: Do not launch. Fix critical + high-priority items (4 hours work), re-test, then green-light. Trail of Bits checklists show similar checkouts had 8.3 issues on average; your flow has 6 actionable items.
About this skill
name: trail-of-bits-security-skill description: Use when Audits your code for security issues before you ship, using Trail of Bits' professional security review methodology.
Trail of Bits Security Skill
This skill packages Trail of Bits security auditing checklists into a Claude skill that reviews code for common vulnerability classes before deployment.
What you get
- Public GitHub repo maintained by Trail of Bits with the full skill set.
Customize your output
- Scope the audit to specific vulnerability classes or file paths.
Example output
Shown in the 10 Free Claude Code Skills rundown video.
Best for
Developers and security teams shipping production code.
SKILL.md preview
---
name: trail-of-bits-security-skill
description: Use when code needs a professional-grade security review before shipping, checking for common vulnerability classes using an established audit methodology.
version: 1.0.0
category: Development / Security
author: AgentVolt
license: proprietary
tags:
- development
- security
- standard
---
# Trail of Bits Security Skill
Packages a professional security-auditing checklist into a repeatable code review that screens for common vulnerability classes before deployment.
## When to use
… (sign up to view the full skill)More development skills
View all Development skills →Security Scanning
Scans code changes for common security issues before they ship.
Secure Code Guardian
Implements authentication, authorization, and input validation with concrete secure defaults, preventing OWASP Top 10 vulnerabilities in new code.
Security Reviewer
Identifies security vulnerabilities, generates structured audit reports with severity ratings, and provides actionable remediation guidance.
Fullstack Guardian
Builds security-focused full-stack web applications by implementing integrated frontend and backend components with layered security at every level.