parser-differential-bypass

What problem does it solve?

This Skill addresses critical security gaps that emerge when different system layers (including frontends, backends, reverse proxies, WAFs, and CDNs) parse the same input differently, leading to undetected bypasses of authentication, access control lists, and input validation filters.

Core Features & Use Cases

• Multi-Layer Parsing Exploit Techniques: Covers methods for exploiting duplicate JSON key handling, conflicting Authorization header processing, content-type confusion, HTTP parameter pollution, path normalization mismatches, and URL encoding desyncs.
• Red Team Testing Use Case: Security professionals can use this Skill to identify and exploit parser differential vulnerabilities in web applications during authorized penetration tests and red teaming engagements.

Quick Start

Use the parser-differential-bypass skill to test a target web application for authentication bypass vulnerabilities by submitting duplicate JSON keys and conflicting Authorization headers through its proxy layer.