Individual skill
validating-cors-policies
Validate CORS policies for security issues and misconfigurations. Use when reviewing cross-origin resource sharing. Trigger with 'validate CORS', 'check CORS policy', or 'review cross-origin'.
skills/.curated/validating-cors-policies/SKILL.md
Source commit 0500b275e963c027f6b410e8c49c0446945c574e
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- Yes
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- Observed behavior
- Not checked yet
- Last checked
- Nov 12, 2026
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Repository context
- Repository stars (not skill ratings)
- 2,916
- Repository last updated
- Nov 12, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai Repository topic
- automation Repository topic
- claude-code Repository topic
- devops Repository topic
- mcp Repository topic
- ai-agents Repository topic
- anthropic Repository topic
- claude-code-plugins Repository topic
- developer-tools Repository topic
- llm Repository topic
- security Declared skill tag
- validating-cors Declared skill tag
- security Derived category
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SKILL.mdcore · 6,543 bytesassets/README.mddoc · 197 bytesreferences/README.mddoc · 64 bytesscripts/README.mddoc · 470 bytesscripts/generate_test_cases.pyruns · 16,295 bytesscripts/validate_cors.pyruns · 13,177 bytes
Read excerpt
# Validating CORS Policies
## Overview
Validate Cross-Origin Resource Sharing configurations in web applications and
APIs for security misconfigurations that enable unauthorized cross-origin access.
This skill analyzes CORS headers, middleware configurations, and server response
behavior to detect wildcard origins, reflected origins, credential leakage, and
overly permissive header/method exposure.
## Prerequisites
- Access to the target codebase and configuration files in `${CLAUDE_SKILL_DIR}/`
- For live endpoint testing: WebFetch tool available and target URLs accessible
- Familiarity with the web framework in use (Express, Django, Flask, Spring, ASP.NET, etc.)