exploiting-mass-assignment-in-rest-apis

name	exploiting-mass-assignment-in-rest-apis
description	Discover and exploit mass assignment vulnerabilities in REST APIs to escalate privileges, modify restricted fields, and bypass authorization controls by injecting unexpected parameters in API requests. Use when working with exploiting mass assignment in rest apis.
domain	cybersecurity
tags	["mass-assignment","api-security","privilege-escalation","rest-api","autobinding","parameter-injection","owasp-api"]
subdomain	web-application-security
version	1.0
author	oyi77
license	Apache-2.0
nist_csf	["PR.PS-01","ID.RA-01","PR.DS-10","DE.CM-01"]

Exploiting Mass Assignment In Rest Apis

Overview

Cybersecurity skill for exploiting mass assignment in rest apis. Follows industry best practices and security standards.

When to Use

Trigger phrases:

• "exploiting mass assignment in rest apis"

• "Discover and exploit mass assignment vulnerabilities in REST APIs to escalate pr"

• When testing REST APIs that accept JSON input for creating or updating resources

• During API security assessments of applications using ORM frameworks (Rails, Django, Laravel, Spring)

• When testing user registration, profile update, or account management endpoints

• During bug bounty hunting on applications with CRUD API operations

• When evaluating role-based access control implementation in API-driven applications

When NOT to Use

• When you lack proper authorization for testing
• For production systems without change management
• When the task requires legal or compliance expertise beyond technical scope

Prerequisites

• Burp Suite or Postman for API request crafting and interception
• Understanding of ORM auto-binding behavior in common frameworks
• API documentation or endpoint discovery through reconnaissance
• Multiple user accounts with different privilege levels for testing
• Knowledge of common sensitive fields (role, isAdmin, verified, balance, price)
• Arjun or param-miner for hidden parameter discovery

Legal Notice: This skill is for authorized security testing and educational purposes only. Unauthorized use against systems you do not own or have written permission to test is illegal and may violate computer fraud laws.

Workflow

# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs() -> :
     {k: re.findall(v, text)  k, v  IOC_PATTERNS.items()}