Individual skill
exploiting-broken-function-level-authorization
Tests APIs for Broken Function Level Authorization (OWASP API5:2023) by identifying admin and privileged endpoints, then reaching them with regular-user credentials via HTTP method switching, URL path manipulation, and parameter tampering. Use when testing whether low-privilege users can invoke admin API functions or otherwise escalate privileges via function-level access control gaps.
skills/exploiting-broken-function-level-authorization/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
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- Last checked
- Nov 9, 2026
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- 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
- api-security Declared skill tag
- owasp Declared skill tag
- authorization Declared skill tag
- bfla Declared skill tag
- privilege-escalation Declared skill tag
- access-control Declared skill tag
- security Derived category
- testing Derived category
- security-application Derived category
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# Exploiting Broken Function Level Authorization
## When to Use
- Testing whether regular users can access administrative API endpoints by direct URL access
- Assessing APIs for vertical privilege escalation where users can invoke functions above their role
- Evaluating if API gateways and middleware consistently enforce function-level access controls
- Testing role-based access control (RBAC) implementation across all API endpoints and HTTP methods
- Validating that API documentation does not expose admin endpoint paths that lack authorization
**Do not use** without written authorization. BFLA testing involves attempting to execute administrative functions with unauthorized credentials.
## Prerequisites
- Written authorization specifying target API and administrative functions in scope