How does Claude validate a CORS policy?

Claude uses the cors-policy-validator plugin to inspect headers or local configuration files, comparing them against security best practices to identify risks like wildcard origins in sensitive environments.

Can I check a live website's CORS configuration?

Yes, by providing a URL, the skill can fetch the CORS headers from the specified endpoint and provide a summary of its security posture.

Does this skill provide fixes for identified issues?

The skill generates a detailed report of findings; you can then ask Claude to generate the corrected configuration code based on those specific recommendations.

What file formats does the validator support?

It primarily supports JSON policy files and raw HTTP header outputs, though it can analyze any structured text containing CORS configuration details.

CORS Policy Validator

Name: CORS Policy Validator
Author: intent-solutions-io

byintent-solutions-io

セキュリティとテスト

Analyzes and validates Cross-Origin Resource Sharing (CORS) configurations to identify security vulnerabilities and ensure policy correctness.

概要

The CORS Policy Validator skill for Claude Code streamlines the process of auditing web application security by scrutinizing CORS settings. It can ingest configuration files or fetch headers directly from live API endpoints to detect misconfigurations, such as overly permissive origins or insecure credential handling. By providing a detailed report on vulnerabilities, this skill helps developers harden their infrastructure against unauthorized cross-origin requests and data leaks, ensuring that policies are correctly implemented according to industry best practices.

主な機能

Automated CORS header analysis from live API endpoints
Detection of common security vulnerabilities and misconfigurations
Support for verifying multiple origin and header permissions
0 GitHub stars
Static validation of CORS policy files and JSON configurations
Detailed reporting with actionable security recommendations

ユースケース

Troubleshooting 'CORS error' messages during frontend-backend integration
Auditing existing web infrastructure for overly permissive origin policies
Verifying API security configurations before production releases

概要

主な機能

Automated CORS header analysis from live API endpoints
Detection of common security vulnerabilities and misconfigurations
Support for verifying multiple origin and header permissions
0 GitHub stars
Static validation of CORS policy files and JSON configurations
Detailed reporting with actionable security recommendations

ユースケース

Troubleshooting 'CORS error' messages during frontend-backend integration
Auditing existing web infrastructure for overly permissive origin policies
Verifying API security configurations before production releases