Cybersecurity • Web Pentest

Advanced Web Penetration Testing

A structured security assessment focused on authentication, authorization, APIs, and sensitive workflows. Findings were validated, prioritized by impact, and remediations were verified.

AuthN / AuthZ API Surface Exploit Validation Fix Verification OWASP-Aligned

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Record Summary

NDA-safe pentest record with clear methodology and verified fixes.

Scope

Web app + REST APIs + admin workflows + payment-related endpoints (where applicable).

Method

OWASP-aligned testing: discovery → mapping → auth testing → exploit validation → remediation verification.

Output

Risk-ranked findings, reproduction steps, fixes, and post-fix verification evidence.

Primary Issues Found

Common high-impact failures in real products.

Broken Access Control (IDOR): object access via predictable IDs without proper authorization checks.
Privilege Escalation: role boundary gaps in admin actions and API routes.
Session Weakness: missing rotation/invalidations under sensitive transitions.
Security Misconfiguration: verbose errors, overly permissive CORS, and missing security headers.

Methods Used

Professional, repeatable, and verifiable.

Attack surface mapping: endpoints, roles, and sensitive workflows.
Authorization matrix testing across users/roles/tenants.
Manual exploitation + controlled automation for coverage.
Fix verification: retest under realistic conditions and regression checks.

Example Finding — IDOR

NDA-safe description, real-world pattern.

Vulnerability

The API allowed access to another user’s resource by changing an identifier in the request. Server validated authentication but failed authorization ownership checks.

Impact: cross-user data exposure.
Likelihood: high in multi-user environments.

Remediation

Enforced server-side ownership checks + scoped queries by user/tenant + removed direct object references.

Policy layer for authorization (centralized).
Audit logs for sensitive access attempts.

Verification After Fix

Fixes must hold under real behavior.

Retest With Role Matrix

AuthZ

Multiple user roles attempted the same actions; access remained correctly enforced.

Regression Checks

Stability

Ensured the fix didn’t break legitimate flows and maintained expected UX behavior.

Hardening Improvements

Posture

Headers, CORS tightening, error handling, and session lifecycle improvements.

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Verified findings, prioritized risk, and remediation you can ship without breaking the product.

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