How do I use this skill to check a live URL?

Simply ask Claude to 'Check CORS headers for [URL]' and the skill will fetch the response headers and analyze them for security issues.

Why is CORS validation important for my project?

Misconfigured CORS policies are a common source of security breaches, allowing malicious third-party sites to interact with your API and steal user data.

Can I use this for local development files?

Absolutely. You can provide the path to a local file, such as 'cors_policy.json', and the skill will validate the contents against best practices.

Does this skill identify security risks like wildcard origins?

Yes, it specifically flags risky configurations such as overly permissive 'Access-Control-Allow-Origin: *' headers that could expose sensitive data.

CORS Policy Validator

Name: CORS Policy Validator
Author: BbgnsurfTech

byBbgnsurfTech

•

Security & Testing

Analyzes and validates Cross-Origin Resource Sharing (CORS) configurations to identify security vulnerabilities and ensure compliant web application access.

The CORS Policy Validator skill empowers Claude to perform deep inspections of Cross-Origin Resource Sharing settings by leveraging the cors-policy-validator plugin. It is designed to help developers identify misconfigurations, such as overly permissive origins or insecure headers, that could lead to unauthorized data access. By providing detailed reports on both static configuration files and live API endpoints, this skill ensures that web applications remain secure and compliant with modern security best practices during development and deployment.

Key Features

01Static validation of local CORS configuration files

02Automated CORS header analysis from live URLs

03Compliance checking against industry security standards

043 GitHub stars

05Heuristic analysis to identify subtle misconfigurations

06Detailed vulnerability reporting and risk assessment

Use Cases

01Debugging cross-origin request issues and identifying security gaps

02Validating local policy files like cors_policy.json before deployment

03Auditing an existing API endpoint for secure CORS headers

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add bbgnsurftech/claude-skills-collection skill-adapter

For use in Claude.ai and ChatGPT

Download Skill