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401-403-bypass-techniques

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401/403 bypass playbook. Use when encountering access-denied responses on admin panels, API endpoints, or restricted paths. Covers path manipulation, HTTP method tampering, header injection, protocol downgrade, and automated bypass tools.

When to use

• bypassing 401/403 responses
• path manipulation
• HTTP method tampering
• header injection
• protocol downgrade
• automated bypass tools
• access-denied responses on admin panels
• restricted paths

When not to use

• WAF-specific bypass
• Host header manipulation for routing bypass
• request smuggling
• h2c smuggling
• broader auth bypass
• login flaws
• session handling

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