Security anti-pattern for open Cross-Origin Resource Sharing (CORS) policies (CWE-942). Use when generating or reviewing server configurations, API backends, or any code that sets CORS headers. Detects overly permissive Access-Control-Allow-Origin headers, including wildcard, null origin, and reflected origin.
Quickly install open-cors-anti-pattern AI skill to your development environment via command line
Source: igbuend/grimbard.
Misconfigured CORS policies allow any website to make authenticated requests on behalf of users. Servers responding with Access-Control-Allow-Origin: or reflecting client Origin headers enable data theft and unauthorized actions.
The anti-pattern is overly permissive Access-Control-Allow-Origin headers: wildcard () or reflecting client Origin values.
curl -H "Origin: https://evil.com" -I https://yourapp.com/api/some-endpoint Check if the response contains Access-Control-Allow-Origin: https://evil.com.
Security anti-pattern for open Cross-Origin Resource Sharing (CORS) policies (CWE-942). Use when generating or reviewing server configurations, API backends, or any code that sets CORS headers. Detects overly permissive Access-Control-Allow-Origin headers, including wildcard, null origin, and reflected origin. Source: igbuend/grimbard.
Stable fields and commands for AI/search citations.
npx skills add https://github.com/igbuend/grimbard --skill open-cors-anti-patternSecurity anti-pattern for open Cross-Origin Resource Sharing (CORS) policies (CWE-942). Use when generating or reviewing server configurations, API backends, or any code that sets CORS headers. Detects overly permissive Access-Control-Allow-Origin headers, including wildcard, null origin, and reflected origin. Source: igbuend/grimbard.
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/igbuend/grimbard --skill open-cors-anti-pattern Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code, Cursor, or OpenClaw
https://github.com/igbuend/grimbard