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

0•

Seguridad y Pruebas

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

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.

Características Principales

01Automated CORS header analysis from live API endpoints

02Detection of common security vulnerabilities and misconfigurations

03Support for verifying multiple origin and header permissions

040 GitHub stars

05Static validation of CORS policy files and JSON configurations

06Detailed reporting with actionable security recommendations

Casos de Uso

01Troubleshooting 'CORS error' messages during frontend-backend integration

02Auditing existing web infrastructure for overly permissive origin policies

03Verifying API security configurations before production releases

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add intent-solutions-io/plugins-nixtla cors-policy-validator

For use in Claude.ai and ChatGPT

Download Skill