Application Security Audit – Real-World Threat Modelling & Manual Verification
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Reporting Time1 Day
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English CompetencyNative Or Bilingual
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Location
Service Description
🔎 Realistic, Strategy-Led Application Security Testing
This is a custom-built, manual-first security assessment aligned to your application’s architecture, threat model, and operational footprint. The engagement replicates modern attacker tradecraft and adversarial behavior patterns, focusing on pre-auth and post-auth risks, user role abuse, and chained misconfigurations. Each vector is tested through both automated reconnaissance and human-driven exploitation, with results tailored for engineering teams.
🔍 Test Coverage Includes:
• Session management and authentication logic, including token handling, revocation, and replay resistance
• Input validation layers across REST, GraphQL, and UI elements using fuzzing, payload injection, and encoding bypasses
• Access control mechanisms tested against horizontal and vertical privilege escalation scenarios
• Application-specific logic abuse and workflow manipulation such as bypassing multi-step sequences or triggering unintended state changes
• Third-party dependency review and SBOM validation using SCA tools and manual inspection
• Security headers, CORS misconfigurations, and open redirect vectors
• File upload validation, MIME-type enforcement, and SSRF surface checks
• Frontend-source mapping, error leakage, version exposure, and CSP misconfigurations
📄 Deliverables Include:
• Technical PDF report with CVSSv3 scoring, PoC payloads, and affected URIs
• Exploitation walkthroughs with Burp logs, screenshots, and custom tooling where required
• Line-by-line remediation suggestions with contextual notes and relevant CWE/OWASP mappings
• Optional: Executive summary report or 1:1 dev walkthrough for remediation support
🛠️ Technology Focus:
Experienced across SPAs, monoliths, and distributed microservice architectures. Commonly tested stacks include Node.js, Laravel, Flask, Angular, Strapi, Python (Django/Flask), GraphQL, and identity providers such as AWS Cognito, Azure AD B2C, Auth0, and custom OIDC flows. Familiar with Kubernetes ingress policies, reverse proxies, API gateways, and modern CI/CD deployment patterns.
👨💻 Analyst Background:
Ireland-based senior security analyst with over five years of freelance application security experience across fintech, e-commerce, and healthcare platforms. My engagements are driven by threat modeling and grounded in adversarial realism. The output is technical, tailored, and designed to withstand scrutiny from both auditors and engineers. I prioritize signal over noise, and quality over quantity.
We found Cian on Vulnn and were immediately impressed by how clearly his service was laid out. The description was detailed, structured, and easy to understand. It gave us full confidence in what to expect before we even got in touch. The way he explained his process and deliverables made it easy to justify the purchase internally.
Once the work started, Cian was sharp, responsive, and proactive. He got straight to the core of our application, tailored the audit to our setup, and didn’t miss a beat. His attention to business logic and real-world attack scenarios really came through in the findings.
The report itself was excellent. It was professionally formatted, prioritized in a way our team could immediately act on, and supported with clear evidence and remediation guidance. He also stuck to the timelines he promised, and followed up with a retest to confirm the fixes.
What stood out most was how consistent and comprehensive the entire engagement felt. From the Vulnn listing to the final delivery, everything was well put together. It was obvious Cian put thought and care into the service. We’d absolutely recommend him to any other team looking for a real application security assessment!
Service was one of the most technically sharp we’ve seen on Vulnn. The way he laid out the scope and deliverables made it easy to trust that we were in good hands. His work went deep; not just OWASP boilerplate but actual reverse engineering and logic-focused testing that surfaced real risk. We’d recommend him to any team that wants more than just a scan!