Client: ABC E-Commerce Ltd.
Date: February 7, 2026
Version: 1.0 (Final)
1. Executive Summary
Overview
ABC E-Commerce Ltd. engaged [Your Company] to conduct a Web Application Penetration Test against the "Payment Portal" environment. The assessment was performed from Feb 1st to Feb 5th, 2026, using a "Grey Box" approach.
Business Risk Assessment
The assessment identified CRITICAL security flaws that could lead to massive data leakage. Specifically, the "Insecure Direct Object Reference (IDOR)" vulnerability allows any user to download invoices belonging to other customers, directly violating GDPR/Privacy laws.
Vulnerability Severity Distribution
2. Scope & Methodology
Methodology
This assessment followed the OWASP Top 10 (2021) testing framework and the PTES (Penetration Testing Execution Standard) guidelines.
| Target URL / IP | Description | Testing Type |
|---|---|---|
| https://portal.abc-ecommerce.com | Main Web Application | Grey Box (User Creds provided) |
| 192.168.1.50 | Backend API Server | Black Box |
Exclusions: Denial of Service (DoS) attacks and Social Engineering were strictly out of scope.
3. Detailed Technical Findings
Description
The application fails to verify if the user requesting a resource is the actual owner. By changing the `invoice_id` in the URL, an attacker can access other users' files.
Proof of Concept (Evidence)
The following request demonstrates accessing Invoice #1005 while logged in as User #1001:
Remediation
Implement server-side access control checks. Ensure `current_user.id == resource.owner_id` before returning data.
Description
The `search` parameter in the product catalog is vulnerable to Blind SQL Injection. The application does not return SQL errors but responds differently based on True/False queries.
Proof of Concept (Evidence)
Payload causing a 5-second delay confirms the vulnerability:
Remediation
Use Parameterized Queries (Prepared Statements) for all database interactions. Do not concatenate user input directly into SQL strings.
4. Strategic Recommendations
| Priority | Recommendation | Estimated Effort |
|---|---|---|
| Immediate | Fix IDOR on Invoice Download endpoints to prevent data leak. | Low (1-2 Days) |
| High | Implement Prepared Statements to fix SQL Injection. | Medium (1 Week) |
| Medium | Conduct a code review on all API endpoints for Access Control logic. | High (2 Weeks) |
End of Report (4 of 25 Pages)
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