Individual skill
testing-cors-misconfiguration
Identifying and exploiting Cross-Origin Resource Sharing misconfigurations that allow unauthorized cross-domain data access and credential theft during security assessments.
skills/testing-cors-misconfiguration/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
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- Network or broad shell
- Last checked
- Nov 9, 2026
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- Repository stars (not skill ratings)
- 35,893
- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
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- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- penetration-testing Declared skill tag
- cors Declared skill tag
- web-security Declared skill tag
- owasp Declared skill tag
- same-origin-policy Declared skill tag
- burpsuite Declared skill tag
- data Derived category
- security Derived category
- testing Derived category
- security-application Derived category
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Read excerpt
# Testing CORS Misconfiguration
## When to Use
- During authorized penetration tests when assessing API endpoints for cross-origin access controls
- When testing single-page applications that make cross-origin API requests
- For evaluating whether sensitive data can be exfiltrated from a victim's browser session
- When assessing microservice architectures with multiple domains sharing data
- During security audits of applications using CORS headers for cross-domain communication
## Prerequisites
- **Authorization**: Written penetration testing agreement for the target
- **Burp Suite Professional**: For intercepting and modifying Origin headers