access-mass-assignment

Mass assignment vulnerability testing injects unauthorized fields into request payloads to detect improper field binding. It identifies critical API vulnerabilities where unauthorized users can modify internal or administrative fields by injecting unexpected properties into request payloads.

To audit API endpoints for over-posting vulnerabilities, map request and response shapes to identify hidden fields, then systematically inject unauthorized properties into body, query, nested, and array parameters to detect improper field binding.

Yes, mass assignment testing targets web applications using nested serializers, JSON binding, or query parameter parsing. It systematically tests these parsing mechanisms to ensure strict field-level authorization across all input vectors.

Safe API security probing for privilege escalation requires a defined test scope, authorized test accounts, and a valid authorization cache. These prerequisites ensure safe, evidence-backed security probing during the vulnerability audit.

Use automated vulnerability scanning for mass assignment during a security audit to verify endpoints do not allow users to escalate privileges by injecting administrative fields like is_admin into JSON requests.