skills.rest
uphiago
uphiagoCOMMUNITY
Explore all skills by this author →
Website𝕏@uphiagoGitHub

api-noauth-hunt

Discover unauthenticated API endpoints and validate full CRUD access.

1.1k|191|Updated Jun 24, 2026
Search Tags:#vulnerability assessment#penetration testing#data breach#api security#api reconnaissance#unauthenticated api#crud testing
One-click install
npx skills add https://github.com/uphiago/recon-skills --skill api-noauth-hunt
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: api-noauth-hunt
Source: https://github.com/uphiago/recon-skills/tree/main/recon/api-noauth-hunt
Command: npx skills add https://github.com/uphiago/recon-skills --skill api-noauth-hunt

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill addresses the high-risk vulnerability of APIs with no authentication, which leads to unauthorized data theft, full CRUD operation access, and complete system compromise, a flaw confirmed across hundreds of real-world targets including enterprise tax portals, healthcare systems, and fintech platforms.

Core Features & Use Cases

  • Unauthenticated API Discovery: Fuzzes common API paths and identifies exposed endpoints, OpenAPI/Swagger schemas, and GraphQL interfaces on non-standard ports and API subdomains.
  • Full CRUD Validation: Tests read, create, update, and delete functionality on exposed endpoints to confirm exploitability, including login bypass tests for endpoints that accept empty or invalid credentials.
  • Real-World Validated Use Cases: Has been used to extract PII from 1,082 client records on an enterprise tax portal (CVSS 10.0), access 34 hospital user accounts with plaintext passwords, and retrieve 59 energy contract records with AWS cost data.

Quick Start

Use the api-noauth-hunt skill to scan the target URL https://api.target.com for unauthenticated API endpoints and test for full CRUD access.

Frequently Asked Questions about api-noauth-hunt

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find unauthenticated API endpoints during a penetration test?▼

Unauthenticated API discovery involves fuzzing common API paths and scanning web applications, API subdomains, and non-standard HTTP ports. It identifies exposed endpoints, OpenAPI/Swagger schemas, and GraphQL interfaces referenced in JavaScript bundles without needing credentials.

What is unauthenticated API CRUD testing and how does it work?▼

Unauthenticated API CRUD testing validates read, create, update, and delete operations on exposed endpoints to confirm exploitability. It includes testing login bypass methods on endpoints accepting empty or invalid credentials to verify unauthorized access.

Can I extract OpenAPI schemas from JavaScript bundles during API reconnaissance?▼

Yes, API reconnaissance can extract OpenAPI schemas and identify endpoints referenced in JavaScript bundles. It validates CRUD functionality on these exposed endpoints without requiring authentication credentials.

How do I scan extracted API data for PII in a data breach assessment?▼

Scanning extracted API data for PII involves testing exposed unauthenticated endpoints for full CRUD access. This validates unauthorized data extraction from client records, healthcare systems, and enterprise platforms during data breach assessments.

Does this API security testing method work on non-standard HTTP ports?▼

Yes, API security testing works on non-standard HTTP ports and API subdomains. It fuzzes common API paths across web applications to discover exposed endpoints, OpenAPI schemas, and GraphQL interfaces without requiring authentication.

What are the limitations of testing APIs with no authentication for vulnerability assessment?▼

Testing APIs with no authentication targets endpoints lacking access controls for vulnerability assessment. It does not evaluate authenticated vulnerabilities, complex authorization logic flaws, or business logic errors requiring valid user sessions or tokens.

Related Skills

Explore More Software Engineering Skills→
jthackjthack
205

ffuf-web-fuzzing

Fuzz web targets to discover hidden directories, files, subdomains, and API endpoints.

Community
Advanced
jinyimeng01jinyimeng01
54

report-agent

Generate HackerOne-format vulnerability reports from validated security findings.

Community
Advanced
salmanabdurrahmansalmanabdurrahman

client-spa-endpoints

Extract API endpoints, hostnames, and routes from JavaScript bundles via static analysis.

Community
Advanced
apisec-incapisec-inc
18

bola-detector

Detect BOLA vulnerabilities in API endpoints by enforcing ownership checks at the query level.

Official
Advanced