Your APIs may expose more than you think
We identify how your APIs can be abused, manipulated, or bypassed before they impact your business, data, or operations.
APIs expose how your business actually works
APIs are not just technical interfaces:
They define how your systems interact and how your business logic is executed.
If an API is vulnerable, attackers don’t need to break in: they simply use your own logic against you.
NO signs of breaking in
Attackers have no need to break in: they interact with your APIs as intended.
They use valid requests in unintended ways; that’s why they can fly under the radar.
They abuse your business logic
Workflows, parameters and assumptions can be manipulated.
Transactions and permissions may behave differently than expected. Be ready for attacks: pay attention, not the costs of breaking in.
Before anyone notices
Data can be exposed, modified or misused – often without triggering alerts or errors.
Are you ready to realise that your system is compromised? If not, you need a plan.
Working with Whiteshield means safety for your flows and data.
Evaluate your API risks, get to know your options ASAP!
How we test your APIs in real-world conditions
Our API testing follows a structured methodology focused on real-world attack scenarios and on validating business logic.
We combine automated tools with manual testing to identify both common vulnerabilities and complex logic flaws.
Scope Definition
We define the testing scope and identify the API components in your environment.
This includes endpoints, integrations, and systems that support critical business operations.
API Contract Validation
We review the API specification as a contract between systems.
This includes analysing Swagger or OpenAPI definitions to ensure the design is consistent, secure, and correctly implemented.
We specifically look for:
- inconsistencies between specification and implementation
- missing validation rules
- assumptions that can be abused
Automated Testing & OWASP API Top 10
We perform automated testing to identify common vulnerabilities and misconfigurations.
Testing includes coverage of:
- OWASP API Top 10 risks
- authentication and authorization flaws
- data exposure and misconfiguration issues
Automated tools help identify low-hanging issues, but they are only one part of the assessment. You need us, and we are ready to protect your company.
API Understanding
We analyse how your APIs are used in real business processes.
- How data flows through the system
- How services interact
- What assumptions are built into the design
This helps us focus on the areas with the highest business impact and helps your company stay safe while growing.
Attack Mapping & Business Logic
We map realistic attack paths based on how your APIs are intended to work.
Instead of focusing only on technical vulnerabilities, we analyse business logic and workflows.
This allows us to identify:
- misuse of valid API functionality
- privilege escalation scenarios
- manipulation of business processes
These issues are typically not detectable by automated tools.
Real-World Attack Scenarios
We validate findings through realistic attack scenarios.
Our approach simulates how an attacker would interact with your API in practice, combining technical knowledge with business context.
This ensures that identified issues are:
- exploitable in real-world conditions
- relevant to your environment
- actionable for remediation
API security insights
APIs often appear secure in design but fail in the real world. Many vulnerabilities are not caused by missing controls, but by incorrect assumptions in how systems interact and how business logic is implemented.
Understanding these risks requires more than automated scanning; it requires testing how your APIs behave in practice.
Case study: The hacker and the one-cent hotel room
A 20-year-old hacker identified a security flaw in the online booking systems of Spanish luxury hotels and managed to reserve rooms and premium apartments for just 1 cent each. The largest single loss exceeded €4,000, while the cumulative damage reportedly reached…
If our systems had been hacked we would surely know about it
The truth is that a talented enough hacker would leave hardly any noticable trail. In fact, malicious attackers could come and go at ease at the borders of the corporate network, reconfigure services and open backdoors for ease of passage, and may even manage to…
Security Starts With a Conversation
Skip the sales pitch. Have a high-level conversation about your business
continuity and operational risk.