validating-cors-policies

## Overview This skill empowers Claude to assess the security and correctness of CORS policies. By leveraging the cors-policy-validator plugin, it identifies misconfigurations and potential vulnerabilities in CORS settings, helping developers build more secure web applications. ## How It Works 1. **Analyze CORS Configuration**: The skill receives the CORS configuration details, such as headers or policy files. 2. **Validate Policy**: It utilizes the cors-policy-validator plugin to analyze the provided configuration against established security best practices. 3. **Report Findings**: The skill presents a detailed report outlining any identified vulnerabilities or misconfigurations in the CORS policy. ## When to Use This Skill This skill activates when you need to: - Validate a CORS policy for a web application. - Check the CORS configuration of an API endpoint. - Identify potential security vulnerabilities in existing CORS implementations. ## Examples ### Example 1: Validating a CORS Policy File User request: "Validate the CORS policy in `cors_policy.json`" The skill will: 1. Read the `cors_policy.json` file. 2. Use the cors-policy-validator plugin to analyze the CORS configuration. 3. Output a report detailing any identified vulnerabilities or misconfigurations. ### Example 2: Checking CORS Headers for an API Endpoint User request: "Check CORS headers for the API endpoint at `https://example.com/api`" The skill will: 1. Fetch the CORS headers from the specified AP...