Service Interfaces
Your API is your attack surface. We prove where it breaks.
APIs expose business logic directly. Privout tests REST, GraphQL, gRPC, and WebSocket interfaces for the authorization failures, data leakage, and abuse patterns that emerge only under manual, context-aware testing — not generic fuzzing.
What We Test
Targeted coverage, not a generic scan.
Broken Object-Level Authorization
Direct object reference manipulation across every endpoint to confirm tenant and user isolation boundaries.
Broken Authentication
Token forging, JWT algorithm confusion, OAuth flow abuse, API key leakage, and session binding weaknesses.
Mass Assignment & Data Exposure
Unintended field acceptance on write operations and excessive data returned on read operations.
Rate Limiting & Resource Exhaustion
Brute-force feasibility, pagination abuse, batch endpoint overload, and denial-of-service via expensive queries.
GraphQL-Specific Attacks
Introspection leakage, query depth/complexity abuse, batching attacks, and field-level authorization gaps.
Injection via API Parameters
NoSQL injection, SSRF through URL parameters, command injection in webhook callbacks, and header manipulation.
Methodology
How the engagement runs.
Schema & Contract Review
OpenAPI specs, GraphQL schemas, and Protobuf definitions are reviewed before testing to map every exposed operation.
Context-Aware Fuzzing
Payloads are crafted with knowledge of the data model, not randomly generated — targeting the seams between authorization layers.
Multi-Role Testing
Every endpoint is tested across all privilege levels — unauthenticated, basic user, elevated roles, and cross-tenant.
Chained Exploits
Individual weaknesses are combined into end-to-end attack scenarios demonstrating data breach or account takeover paths.
Deliverables
What you walk away with.
Every engagement closes with clear, actionable output — not a data dump.
Endpoint-level finding map with severity and exploitability ratings
Reproduction requests with full HTTP traces
Authorization matrix audit against documented roles
Complimentary retest to validate applied fixes
Credentials
Backed by hands-on certification.
The certifications that directly inform this assessment discipline.
OSWE
Offensive Security Web Expert
CPTS
Certified Penetration Testing Specialist
CWES
Certified Web Exploitation Specialist
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