Web Application Penetration Testing Services
Your web application is the most exposed layer of your attack surface. Every authenticated user, form field, API call, and role-based workflow is a potential entry point. Automated scanners surface known patterns — they don’t simulate what a determined attacker actually does.
At Pentest Testing Corp, web app penetration testing means a human analyst authenticates across every user role, maps every endpoint and parameter, attempts to break your business logic, and chains low-severity findings into high-impact exploit paths. Led by Md. Shofiur, a certified Ethical Hacker and Web Application Penetration Testing specialist recognized as a top-ranked cybersecurity professional on Freelancer.com. Our team has conducted thousands of assessments across 257+ companies in 30+ countries, identifying 6,000+ validated vulnerabilities in SaaS platforms, fintech applications, e-commerce systems, and healthcare portals.
Engagements start from $5,000. Production SaaS and multi-role platforms typically range from $9,500 to $25,000+, scoped to your actual attack surface.
What Real Web Application Security Testing Looks Like
Most vendors run a scanner, tune out the noise, and send you a CVSS-ranked list. That’s not a penetration test. It’s a glorified vulnerability scan.
Real web application penetration testing means a human analyst authenticates as multiple user roles, maps every endpoint and parameter, attempts to break your business logic, chains low-severity issues into high-impact exploit paths, and documents proof-of-exploitation evidence that your development team can actually act on.
That’s the standard every Pentest Testing Corp engagement is held to. Manual-first, evidence-backed, and scoped to what matters to your business.
What We Test: Attack Surface Coverage
Authentication & Session Management: Credential stuffing exposure, session token predictability, JWT vulnerabilities (algorithm confusion, weak secrets, signature bypass), OAuth misconfigurations, SSO trust chain weaknesses, and persistent session issues across logout flows.
Access Control & Authorization: Broken access control is the #1 vulnerability in the OWASP Top 10. We test RBAC enforcement across every role, attempt horizontal and vertical privilege escalation, probe IDOR patterns across object references, and validate tenant isolation in multi-tenant SaaS environments.
Input Handling & Injection: SQL injection (blind and time-based), XSS (reflected, stored, DOM-based), SSTI, LDAP injection, and command injection across every parameter that touches server-side logic.
API Endpoints & Backend Logic: REST and GraphQL endpoints tested for broken authentication, rate limiting gaps, excessive data exposure, and mass assignment vulnerabilities.
Infrastructure-Level Issues: HTTP security headers, TLS configuration, CORS enforcement, subdomain takeover exposure, and clickjacking protection.
Business Logic: Workflow bypass, price manipulation, race conditions (TOCTOU), coupon stacking, and account takeover via abused password reset flows.
OWASP Top 10 – Full Manual Coverage
The OWASP Top 10 is a baseline, not a complete methodology. We use it as a starting point and go deeper in every category: A01 Broken Access Control (IDOR, forced browsing, CORS misconfiguration) through A10 SSRF (internal metadata service access, DNS rebinding). Our testing framework also references NIST SP 800-115 and the SANS/CWE Top 25 for structured technical coverage.
Every category is manually validated with working proof-of-concept evidence, not flagged by automated scan output alone.
Business Logic Flaws: What Scanners Can’t Find
Business logic vulnerabilities are application-specific. No scanner catches them without first understanding how your application is supposed to work, and then testing whether that intent can be subverted.
These are consistently among the most damaging findings we deliver:
- Price and quantity manipulation — Adding negative quantities, applying discount codes out of sequence, modifying order totals in transit between client and server.
- Workflow bypass — Skipping steps in multi-stage processes: completing payment before verification, or accessing restricted features before approval is granted.
- Race conditions — Concurrent requests exploiting time-of-check/time-of-use (TOCTOU) gaps in loyalty systems, fund transfers, and license activation flows.
- Account takeover via logic abuse — Exploiting password reset flows, email verification bypasses, or backup authentication mechanisms to gain control without credentials.
These findings rarely have a CVE number. They don’t appear in scan reports. They’re also the vulnerabilities that produce the most significant breach scenarios.
Methodology
Engagements follow a structured process aligned with OWASP Testing Guide v4.2 and PTES. We begin by defining rules of engagement, enumerating entry points, and mapping authentication flows across every role in scope. From that attack surface inventory, we build a threat model that prioritizes the highest-risk vectors for your application type, tenant isolation for SaaS, payment flows for e-commerce, PHI access paths for healthcare. Active manual testing covers all identified vectors in authenticated and unauthenticated states across each user role. Every vulnerability is validated with working proof-of-concept evidence before it appears in the report; we don’t document theoretical risk.
Business Impact: The Cost of Missing These
- Data breaches from broken access control or injection vulnerabilities trigger regulatory notification under GDPR, HIPAA, and state-level laws, with costs averaging $4.88M per breach (IBM, 2024).
- Financial fraud from business logic flaws — price manipulation, unauthorized fund transfers, coupon abuse — impacts revenue without leaving obvious traces in security logs.
- Compliance failures can delay SOC 2 certification, trigger PCI DSS penalties, or cause insurance coverage disputes following an incident.
- Customer data exposure — PII, financial records, or health data — creates regulatory liability and civil litigation risk.
Finding these vulnerabilities before an attacker does is measurably cheaper than the alternative.
Compliance: PCI DSS, SOC 2, ISO 27001, HIPAA, GDPR
PCI DSS v4.0 (Req. 11.4)
Mandates penetration testing of all cardholder data environment interfaces, including web applications. Our team holds API Security for PCI Compliance certification; reports are structured to provide the evidence your QSA requires.
SOC 2 (CC4.1 / CC7.1)
Requires evidence of risk assessment and security monitoring. A formal pentest with findings and remediation evidence directly satisfies auditor requests for security control validation.
ISO/IEC 27001 (A.8.8 / A.5.36)
Requires ongoing vulnerability management. Md. Shofiur holds an ISO/IEC 27001 Information Security Associate certification, and our reports are formatted accordingly.
HIPAA §164.308(a)(8)
Requires periodic technical evaluations of systems handling protected health information. A formal web application pentest is the standard mechanism for satisfying this requirement.
GDPR Article 32
Requires appropriate technical measures to ensure the security of personal data. Penetration testing provides the documented evidence that regulators expect.
Our reports serve dual purposes: technical remediation guidance for developers, and structured compliance evidence for auditors.
Deliverables
Every engagement includes:
- Executive Summary: Risk posture, critical findings, and strategic recommendations for CISOs and board-level stakeholders.
- Technical Findings Report: Severity classification (Critical/High/Medium/Low), CVSS scoring, proof-of-concept evidence, reproduction steps, and specific remediation guidance per finding.
- Attack Narrative: For Professional and Enterprise tiers: a chain-of-exploitation narrative demonstrating business risk, not isolated issues.
- Developer-Level Remediation Guidance: Specific fix recommendations, not generic “follow OWASP guidelines” references.
- Compliance Evidence Package: Report sections formatted for SOC 2 auditors, PCI QSAs, and ISO 27001 assessors.
- Debrief Call: Findings walkthrough with your development and security teams.
- Retest Certificate: Issued after verified remediation. Starter engagements include retest of critical and high findings; Professional and Enterprise tiers include one and two full retest cycles, respectively.
Pricing
Engagements are scoped by attack surface complexity, not hourly billing.
| Tier | Starting Price | Best For |
|---|---|---|
| Starter | From $5,000 | Small apps, defined feature areas, MVP security validation |
| Professional | From $9,500 | Production SaaS, multi-role RBAC, critical business workflows |
| Enterprise | From $18,000 | Complex platforms, multi-tenant isolation, stricter audit requirements |
| MVP Sprint | From $4,500 | Early-stage startups, limited scope (login + one critical workflow) |
Every engagement includes a scoping call before any agreement is signed.
Frequently Asked Questions about Web App Penetration Testing Services
Ready to Start?
Send us your web app scope, environments, user roles, key workflows, and any compliance requirements. We’ll confirm coverage and send a fixed-price quote within 24 hours.