Web Application & API Penetration Testing
Manual, senior-led web application and API penetration testing for product teams that need credible test results for customers, partners, audits, or internal release gates. Focused on real business risk — not just scanner output.
- SaaS and fintech product teams approaching a major release
- Companies that may need an agreed, appropriately redacted customer-facing summary
- Teams using web app or API testing to support an applicable SOC 2 control or PCI requirement
- Engineering leaders who want findings their developers can actually fix
- Authentication and session management testing
- Authorization and access control testing across roles and tenants
- Business logic and workflow abuse testing
- Input handling, injection, and sensitive data exposure
- API testing aligned to OWASP API Security Top 10
- Optional remediation retest to confirm fixes
What the engagement covers
Authenticated roles and tenants
Testing uses agreed accounts and roles to assess authentication, session handling, tenant isolation, and access-control boundaries.
API authorization and business logic
Coverage focuses on object- and function-level authorization, workflow abuse, input handling, and the application-specific logic automated scans often miss.
Scope and rules of engagement
Targets, environments, test windows, exclusions, escalation contacts, and permitted techniques are documented before testing begins.
Reporting and optional retest
Findings include severity, evidence, reproduction steps, and remediation guidance. An optional retest can verify agreed fixes.
- Credible results, with a customer-facing summary available when agreed and appropriately redacted
- Findings written for developers, with reproduction steps and fix guidance
- Coverage of business logic flaws that automated tools miss
- Confidence before high-stakes releases or contract reviews
- Executive summary for leadership, with customer-facing use agreed and appropriately redacted
- Technical findings report with severity and reproduction steps
- Remediation recommendations mapped to OWASP categories
- Optional retest letter confirming fixes
Four steps from scope to action
- 01
Define the scope
Confirm targets, roles, environments, test windows, and rules of engagement.
- 02
Assess the environment
Test authentication, authorization, business logic, inputs, and APIs within scope.
- 03
Prioritize the findings
Rank confirmed findings by exploitability, business impact, and remediation urgency.
- 04
Deliver the action plan
Provide reproducible evidence and a clear remediation plan for engineering.
Explore other ControlSolid services
- Web Application Penetration Testing Services →Manual web application testing for SaaS and fintech teams preparing for a release, a customer security review, or an agreed compliance milestone.
- API Penetration Testing Services →Manual API testing focused on authorization, tenant boundaries, and business logic across the agreed endpoints and roles in scope.
- Guide: Penetration test attestation letters →What a provider letter proves, what it should disclose, and how it differs from the full technical report.