Applications / APIs
Web Application & API Penetration Testing
Manual testing of the paths that can produce unauthorized access, data exposure, account compromise, or business-process abuse.
Based in Blaine, Minnesota, with local and remote work within agreed scope.
Application boundary model
Follow the request across the control plane.Identity, workflow, and API boundaries are traced as one system. The highlighted route is illustrative, not client architecture.Decision supported
A report that separates reproducible security failures from scanner output and gives developers evidence they can act on.Coverage
What gets examined.
- Authentication, sessions, password reset, MFA, and account recovery
- Object- and function-level authorization, tenant isolation, and administrative boundaries
- REST, GraphQL, and mobile-backed APIs across meaningful user roles
- Stored and reflected XSS, file uploads, SSRF, CORS, injection, and sensitive data exposure
- Business workflows where smaller weaknesses combine into a practical attack path
Method
Testing follows roles and workflows
The assessment compares what different users can see and change, follows state transitions, modifies identifiers and hidden properties, and verifies whether the server enforces the intended rule. Automation supports discovery; impact is reproduced manually.
Inputs
What helps before testing starts.
- Authorized target list and environment
- Test accounts for meaningful roles
- Relevant documentation and production safeguards
- Timeline, communication path, and exclusions
Deliverables
What you receive.
- Concise executive summary
- Technical findings with prerequisites and reproduction steps
- Request/response evidence where appropriate
- Impact and severity rationale
- Practical remediation guidance
Report structure
See how evidence becomes a usable record.
Review a fictional example that shows scope, evidence, severity reasoning, remediation direction, and retest status without using customer data.
View the illustrative report structureStart with the outcome
Need web application & api penetration testing?
Send the target, concern, timeline, and decision you need to make. GK Data will reply with the right scoping questions.
Request a review