security-misconfiguration
Detects insecure defaults, overly permissive CORS, exposed debug endpoints, and missing security headers. Use when writing server configuration, setting environment variables, configuring CORS policies, enabling debug modes, setting up default credentials, or deploying application infrastructure. Also invoke when writing security headers middleware.
Install
With your agent
Install OMGSkills skill "thejefflarson/soundcheck:.claude/skills/security-misconfiguration" into this agent's normal skills directory: call the OMGSkills MCP get_install_plan tool for your agent and run the script it returns (it installs only the pinned commit and verifies SKILL.md), and stop if MCP or the pin is unavailable. Do not overwrite or change existing skills without asking me.
Manual command
git clone https://github.com/thejefflarson/soundcheck /tmp/soundcheck && ln -s /tmp/soundcheck/.claude/skills/security-misconfiguration ~/.claude/skills/security-misconfigurationFrom README
Security Misconfiguration Security Check (A02:2025) What this checks Protects against insecure defaults, overly permissive policies, and missing hardening that expose the application to cross-origin attacks, credential stuffing, and information disclosure via error pages or debug endpoints. Vulnerable patterns Wildcard CORS origin combined with credentials enabled — every site on the web gets cookie-authenticated access Debug or verbose-error mode hardcoded on, exposing tracebacks, route lists, or interactive consoles in production Wildcard or empty host/origin allowlist accepted in production configuration HTTP server with no security-headers layer registered — Strict-Transport-Security, X-Content-Type-Options, and a framing/CSP control missing. For hardcoded secrets see hardcoded-secrets. Fix immediately Flag the vulnerable code, explain the risk, and suggest a fix establishing these properties.
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