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Find What Attackers Could Exploit in Your Web Application

Expert-led web application penetration testing that combines manual security testing with automated discovery to uncover exploitable vulnerabilities, authorization weaknesses, API security issues and business-logic flaws. Choose a fixed-price plan, complete your scope online and start your assessment without a lengthy sales process.

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Delivered bya CREST-accredited penetration testing provider.
TestingCREST AccreditedManual + Automated
DeliveryExpert-Led Testing
CoverageOWASP-Aligned

The definition

What is web application penetration testing?

Web application penetration testing is a controlled security assessment in which security professionals actively test a web application for exploitable weaknesses. It typically combines automated discovery with manual analysis and testing of authentication, authorization, sessions, inputs, APIs, application logic and other relevant security controls.

Unlike a vulnerability scan that primarily identifies potential weaknesses using automated tools, a penetration test combines automated discovery with manual investigation, validation and controlled exploitation. Our testers assess how weaknesses can be combined, whether security controls can be bypassed and what the actual business impact could be. Testing can uncover issues such as broken access controls, injection vulnerabilities, authentication weaknesses, insecure session handling, API authorization problems and application-specific business-logic flaws.

  • CREST Accredited

    Manual and automated testing delivered under CREST accreditation.

  • Expert-Led Testing

    Security professionals lead discovery, exploitation analysis, and reporting.

  • OWASP-Aligned

    Coverage aligned with OWASP Top 10 and WSTG-style methodology.

  • Report & retest

    Technical and executive reporting with a defined retest window on fixed tiers.

Choose the right penetration testing plan

Know your application size? Choose a plan and get started. Not sure? Use the scope criteria below or complete our short scoping questionnaire.

Essential

For smaller web applications, startup products and straightforward customer or internal portals.

$2,499per application

Includes
  • 1 web application
  • Up to 2 authenticated user roles
  • Up to 10 core application workflows
  • Up to 25 API endpoints
  • Manual penetration testing
  • Automated vulnerability discovery
  • Authentication and authorization testing
  • OWASP Top 10 coverage
  • OWASP WSTG-aligned testing
  • Business-logic testing
  • Detailed technical report
  • Executive summary
  • Evidence and remediation guidance
  • 1 retest within 30 days
  • Updated report after retesting

Typical completion: 5–7 business days

Recommended

Professional

For SaaS products and business applications with multiple users, APIs and more complex workflows.

$4,999per application

Everything in Essential, plus
  • Up to 5 authenticated user roles
  • Up to 25 core application workflows
  • Up to 75 API endpoints
  • Enhanced business-logic testing
  • OAuth and SSO testing
  • Complex role and permission testing
  • Administrative functionality
  • Multi-step transactional workflows
  • Extended API security testing
  • 1 retest within 60 days

Typical completion: 7–10 business days

Custom

For large, complex or business-critical applications that require tailored scoping.

Custom pricing

Suitable for
  • 6+ user roles
  • 25+ core workflows
  • 75+ API endpoints
  • Multiple applications
  • Complex multi-tenant platforms
  • Advanced authorization models
  • Large or complex APIs
  • GraphQL
  • WebSockets
  • Financial transaction platforms
  • Complex third-party integrations
  • White-box or source-code-assisted assessments
  • Combined application and infrastructure testing

Timeline and testing effort are agreed after scoping.

Compare plans

FeatureEssentialProfessionalCustom
Price$2,499$4,999Custom
Web applications11Custom
User rolesUp to 2Up to 5Custom
Core workflowsUp to 10Up to 25Custom
API endpointsUp to 25Up to 75Custom
Business-logic testingStandardEnhancedExtensive
OAuth / SSO—
API security testingUp to 25 endpointsUp to 75 endpointsCustom
Retest11Defined in scope
Retest window30 days60 daysDefined in scope
Typical completion5–7 business days7–10 business daysAgreed
Manual penetration testing
Automated discovery
OWASP Top 10 testing
OWASP WSTG-aligned methodology
Authentication testing
Authorization testing
Session security
Technical report
Executive summary

Pricing confirmed at checkout.

Plan selection

Not sure which plan you need?

We'll recommend Essential, Professional, or Custom based on real application complexity—not marketing page count.

What we review during scoping

  • Number of authenticated user roles
  • Number of business workflows
  • API size
  • Authentication mechanisms
  • Authorization complexity
  • Multi-tenancy
  • Payment or transaction functionality
  • Third-party integrations
  • Application architecture

Answer a few short questions and we'll point you to the right fixed-price plan—or Custom if needed.

More Than an Automated Vulnerability Scan

Automated scanners are useful for discovering certain classes of security weaknesses.They cannot reliably understand how your application is supposed to behave—finding these issues requires testing it as an attacker would, not simply running a scanner.

  • Broken AuthorizationCan one customer access another customer's records by changing an identifier?
  • Privilege EscalationCan a standard user perform an administrator-only action?
  • Business-Logic AbuseCan users manipulate a workflow in a way the developers did not intend?
  • Authentication BypassCan authentication, password recovery or MFA controls be circumvented?
  • API AuthorizationCan authenticated users call APIs or access objects they should not be permitted to use?
  • Workflow ManipulationCan required stages of a payment, approval or verification process be bypassed?

Coverage

What We Test

Testing is risk-based and tailored to the functionality exposed by your application.

Information Gathering & Attack Surface

We examine the accessible application surface, technologies, endpoints and functionality relevant to the agreed scope.

  • Application fingerprinting
  • Technology identification
  • Exposed application functionality
  • Sensitive information exposure
  • Application entry points
  • API discovery

Authentication

We assess whether attackers could compromise or bypass mechanisms that establish user identity.

  • Login security
  • Password policies
  • Account enumeration
  • Password-reset mechanisms
  • MFA implementation
  • Remember-me functionality
  • Credential handling
  • Authentication bypass

Authorization & Access Control

We test whether authenticated and unauthenticated users can access functionality or data beyond their intended permissions.

  • Horizontal privilege escalation
  • Vertical privilege escalation
  • Insecure direct object references
  • Role-based access control
  • Administrative functions
  • Object-level authorization
  • Function-level authorization

Session Management

We assess how sessions are created, maintained and terminated.

  • Session token security
  • Cookie configuration
  • Session fixation
  • Logout behavior
  • Session expiration
  • Concurrent sessions
  • CSRF protections where applicable

Input Validation & Injection

We test application inputs and processing logic for exploitable conditions.

  • SQL injection
  • Command injection
  • Cross-site scripting
  • Server-side request forgery
  • Path traversal
  • File inclusion
  • XML-related vulnerabilities
  • Template injection
  • Unsafe deserialization where relevant

Business Logic

We test application-specific processes that automated scanners cannot adequately understand.

  • Workflow bypass
  • Price or quantity manipulation
  • Approval bypass
  • Transaction manipulation
  • Abuse of account functions
  • Rate-limit weaknesses
  • Sequence manipulation
  • Application-specific authorization failures

API Security

Where APIs are included in the selected package, we test their security controls and how they interact with the application.

  • Object-level authorization
  • Function-level authorization
  • Authentication
  • Token handling
  • Input validation
  • Data exposure
  • Rate limiting
  • Mass assignment
  • API workflow abuse

Client-Side Security

We assess relevant browser-side functionality and trust boundaries.

  • Cross-site scripting
  • DOM-based vulnerabilities
  • Sensitive client-side information
  • Browser security controls
  • Cross-origin configuration
  • Client-side logic exposure

File Handling

Where applicable, testing may assess:

  • File upload restrictions
  • File type validation
  • Content validation
  • Storage and retrieval behavior
  • Unauthorized file access
  • Potential execution paths

Methodology

Our Web Application Penetration Testing Methodology

Our approach combines structured security testing with expert-led investigation. Testing is aligned with recognised web application security testing practices, including the OWASP Web Security Testing Guide.

Step 1

Scope

You provide the application details, test environment, user roles, credentials, APIs and testing restrictions through Secusy. We validate that the selected plan matches the application scope before testing begins.

What You Receive

Your assessment produces practical outputs for both management and technical teams.

  • Executive Summary

    A management-level view of the assessment covering assessment scope, key security observations, significant findings, risk distribution, business impact and remediation priorities.

  • Detailed Technical Findings

    Each relevant finding can include vulnerability name, severity, affected component, description, security impact, evidence, reproduction information, remediation guidance and relevant technical references.

  • Evidence of Findings

    Where appropriate, findings include sufficient evidence to help your technical team understand and reproduce the issue without unnecessary exposure of sensitive information.

  • Remediation Guidance

    Clear recommendations help developers understand how each identified weakness can be addressed.

  • Retest Results

    Once remediation is completed, included findings can be retested and their status updated.

Scoping

What Does "One Core Workflow" Mean?

A core workflow is a distinct application function or user journey that requires security testing.

Examples include

  • User registration
  • Login
  • Password reset
  • Account management
  • Checkout
  • Payment
  • Document upload
  • Account approval
  • User administration
  • Subscription management

Static content pages are not normally treated as individual workflows. The workflow limit is designed to estimate application complexity—not to prevent testers from examining functionality relevant to an identified security issue.

Plan boundaries

What's Not Included in the Fixed-Price Plans?

Unless specifically agreed, Essential and Professional do not include:

  • Denial-of-service or load testing
  • Social engineering or phishing
  • Source-code review
  • Mobile application testing
  • Thick-client application testing
  • Cloud configuration assessments
  • Internal network penetration testing
  • External infrastructure penetration testing
  • Testing third-party systems without authorization
  • Additional applications
  • Additional environments
  • Functionality added after the assessment starts
  • Vulnerability remediation or software development
  • Unlimited remediation consulting
  • Testing outside the agreed rules of engagement

Need one of these services?

Remediation

Retesting Included

Finding vulnerabilities is only part of the process. Once your developers have remediated identified issues, request your included retest through Secusy.

  • Essential

    One retest requested within 30 days of the original report.

  • Professional

    One retest requested within 60 days of the original report.

The included retest verifies remediation of vulnerabilities identified during the original assessment. New application functionality, additional systems or vulnerabilities outside the original scope may require additional testing.

Intake

Before Testing Starts

Penetration testing requires explicit authorization and a clearly defined scope. After purchase, Secusy guides you through the information required to begin testing.

You will normally provide

  1. Authorized application URL/domain
  2. Testing environment
  3. Confirmation that you are authorized to test the target
  4. Test accounts for applicable roles
  5. API documentation where relevant
  6. Authentication information
  7. Testing window
  8. Technical contact
  9. Emergency contact
  10. Known third-party integrations
  11. Testing restrictions
  12. Relevant WAF/CDN information

We then confirm the scope and rules of engagement before active penetration testing begins.

Why Secusy?

Buy Without a Lengthy Sales Process

Choose a predefined scope and purchase Essential or Professional directly.

Know What You're Buying

Clear limits for applications, roles, workflows, APIs, retesting and deliverables reduce ambiguity before testing begins.

Expert-Led Testing

Penetration testing is performed by cybersecurity professionals—not delivered as an automated vulnerability scan.

Manage the Engagement Digitally

Use Secusy to progress from purchase and onboarding through assessment, reporting and retesting.

Actionable Results

Reports are designed to help both management understand the risk and developers fix the underlying vulnerabilities.

Delivery partner

Powered by ValueMentor

Secusy is the digital cybersecurity services platform powered by ValueMentor. Penetration testing purchased through Secusy is delivered using ValueMentor's cybersecurity testing capabilities.

Who Is This Service For?

Web application penetration testing can be appropriate for:

SaaS Companies

Test customer-facing SaaS platforms, administration interfaces, tenant isolation and APIs.

Startups

Obtain independent security testing before enterprise customer onboarding, fundraising, launch or security reviews.

E-commerce

Assess authentication, customer accounts, transactions, checkout flows and application APIs.

Fintech

Test access controls, transactional workflows, APIs and sensitive application functionality.

Healthcare Technology

Assess web applications handling sensitive workflows, accounts and integrations.

Enterprises

Independently test internally developed or externally exposed business applications.

Software Teams

Add independent security testing before major releases or as part of the secure development lifecycle.

Timing

When Should You Conduct a Web Application Penetration Test?

Common triggers include:

  • Before launching a new application
  • Before a major production release
  • After significant application changes
  • After major authentication or authorization changes
  • Before onboarding large enterprise customers
  • After adding important APIs or integrations
  • As part of a customer security requirement
  • As part of a security assurance program
  • Following significant application architecture changes
  • Periodically for business-critical applications

A penetration test is a point-in-time assessment. Applications that change frequently may require more frequent or continuous security testing.

Questions

Frequently asked questions

Tell us what your customer, bank, or platform has requested.

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