Cors Policy Validator

Overview

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

• 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

cors_policy.json

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

https://example.com/api

1. Fetch the CORS headers from the specified API endpoint.
2. Use the cors-policy-validator plugin to analyze the headers.
3. Output a report summarizing the CORS configuration and any potential issues.

Best Practices

• Configuration Source: Always specify the source of the CORS configuration (e.g., file path, URL) for accurate validation.
• Regular Validation: Regularly validate CORS policies, especially after making changes to the application or API.
• Heuristic Analysis: Consider supplementing validation with manual review and heuristic analysis to catch subtle vulnerabilities.

Integration

Prerequisites

• Access to codebase and configuration files in {baseDir}/
• Security scanning tools installed as needed
• Understanding of security standards and best practices
• Permissions for security analysis operations

Instructions

1. Identify security scan scope and targets
2. Configure scanning parameters and thresholds
3. Execute security analysis systematically
4. Analyze findings for vulnerabilities and compliance gaps
5. Prioritize issues by severity and impact
6. Generate detailed security report with remediation steps

Output

• Security scan results with vulnerability details
• Compliance status reports by standard
• Prioritized list of security issues by severity
• Remediation recommendations with code examples
• Executive summary for stakeholders

Error Handling

• Verify tool installation and configuration
• Check file and directory permissions
• Validate scan target paths
• Review tool-specific error messages
• Ensure network access for dependency checks

Resources

• Security standard documentation (OWASP, CWE, CVE)
• Compliance framework guidelines (GDPR, HIPAA, PCI-DSS)
• Security scanning tool documentation
• Vulnerability remediation best practices