Web Application Testing
Unit91 conducts manual, adversary-driven web application penetration testing to identify real-world attack paths affecting confidentiality, integrity, and availability. Our assessments go beyond automated scanning to validate exploitability, business impact, and remediation priority. We simulate how real attackers abuse authentication flows, business logic, APIs, and trust boundaries, then provide clear, actionable guidance to eliminate risk.
Why Web Application Testing Matters?
Modern breaches rarely start with infrastructure alone. Web applications are the primary attack surface for:
Customer Data Exposure
We assess how attackers could access, manipulate, or exfiltrate sensitive customer data by abusing application logic, insecure APIs, or misconfigured access controls across the platform.
Account Takeover
We identify weaknesses in authentication, session handling, and token management that could allow attackers to hijack user accounts or bypass identity protections.
Privilege Escalation
We test whether flaws in authorization logic allow users to elevate privileges, access restricted functionality, or move laterally within the application.
Regulatory Non-Compliance
We evaluate application controls against common regulatory expectations to identify gaps that could result in audit failures, fines, or contractual risk.
Brand and Revenue Impact
We demonstrate how exploitable application weaknesses can lead to service disruption, customer trust erosion, and direct financial loss through real-world attack scenarios.
What We Test
Unit 91 assesses web applications using manual testing techniques informed by OWASP ASVS, OWASP Top 10, and real-world attacker tradecraft.
Authentication & Session Management
Account takeover paths
Token misuse and replay
MFA and SSO bypass
Authorization & Access Control
IDOR and privilege escalation
Horizontal and vertical access abuse
Business Logic Flaws
Workflow manipulation
State bypass and race conditions
Input Handling & Injection
XSS, HTML, command injection
Server-side template injection
API & Backend Trust
JWT handling
Improper backend authorization
Client-side trust assumptions
Configuration & Security Controls
Security headers
CORS misconfigurations
Sensitive data exposure
Testing Approaches
Each engagement is scoped to match your environment and risk profile.
Black Box
No prior knowledge; simulates an external attacker with no authenticated access.
Grey Box
Authenticated testing using defined user roles to assess access control and logic flaws.
White Box
Architecture- or source-assisted testing to validate controls and identify deeper logic issues.
Testing Coverage
External-facing applications
Authenticated user workflows
Administrative functionality
Integrated APIs
Third-party services
How Our Web Application Testing Works
Our process follows NIST 800-115 and OSSTMM principles while maintaining flexibility for real-world exploitation.
Scoping & Threat Alignment
Define the attack surface, user roles, trust boundaries, and testing objectives.
Manual Recon & Enumeration
Map application functionality, workflows, and access paths to identify exploitable conditions.
Targeted Exploitation
Validate vulnerabilities through controlled, non-destructive exploitation techniques.
Impact Analysis
Chain weaknesses to demonstrate realistic attacker outcomes and business impact.
Reporting & Remediation
Deliver engineer-ready findings with clear, prioritized remediation guidance.
Optional Retesting
Validate fixes and confirm effective risk reduction.
Deliverables
Every engagement includes a clear, defensible report suitable for engineers, leadership, and auditors.
Executive Summary
High-level overview of key risks, attack paths, and business impact for non-technical stakeholders.
Detailed Technical Findings
Comprehensive documentation of validated vulnerabilities, affected endpoints, and technical root causes.
Proof-of-Concept Evidence
Screenshots, request/response data, and reproduction steps demonstrating real exploitability.
Impact Assessment
Analysis of how findings can be chained to achieve realistic attacker outcomes and business impact.
Remediation Recommendations
Clear, prioritized remediation guidance aligned with industry best practices and secure design principles.
Optional Retest Summary
Validation of remediation efforts and confirmation that identified risks have been effectively addressed.
Standards & Methodology Alignment
Unit 91 aligns testing with recognized security frameworks which ensures findings are defensible, repeatable and audit ready:
OWASP Top 10
Provides coverage of the most critical and commonly exploited web application security risks observed in real-world attacks.
OWASP ASVS
Used to assess application security controls across authentication, authorization, session management, and business logic at an appropriate assurance level.
OWASP Testing Guide
Informs structured, repeatable testing techniques while allowing flexibility for manual, adversary-driven exploration.
OSSTMM
Guides a disciplined, measurable approach to security testing focused on attack surface, trust relationships, and operational risk.
NIST SP 800-115
Aligns testing activities with industry-recognized technical assessment methodology suitable for regulated and enterprise environments.
If you need to understand how your web application would hold up against a real-world attacker, contact us to scope a Web Application Penetration Test.