80+ FinTech targets assessed

FinTech security assessments
for platforms that handle real money

Financial applications handle transactions, store payment data, and manage user funds. A single vulnerability can lead to direct financial loss, regulatory penalties, and irreversible reputation damage.

Request FinTech Assessment

What we test in FinTech

Payment flow manipulation (amount, currency, race conditions)

Authentication bypass on transaction endpoints

IDOR on account/balance/transaction data

OAuth/SSO misconfigurations in banking integrations

API key exposure in client-side bundles

Business logic flaws in lending/credit workflows

FinTech-specific concerns

PCI DSS compliance requirements

Real-time transaction security

Third-party payment processor integrations

Multi-tenant data isolation

How a FinTech engagement runs

A FinTech engagement starts with the money paths: every endpoint that creates, modifies, or settles a transaction gets mapped before a single exploit is attempted. From there we chase the flaws that cost real funds — race conditions that double-credit a balance, webhook handlers that trust unsigned callbacks, IDORs that expose another customer's ledger. The payment-processor boundary gets particular attention, because that is where trust assumptions are least visible in code review.

The report is written for two audiences at once: engineers get reproducible proof-of-concept requests and remediation guidance, while compliance leads get findings mapped to the controls they already report against. Retesting after fixes is part of the engagement, not a follow-up sale.

Regulatory and compliance context

FinTech sits under the heaviest compliance surface of any sector we test: PCI DSS for cardholder data, PSD2 strong-customer-authentication for EU payments, SOC 2 and ISO 27001 for institutional buyers, plus AML/KYC obligations that make the identity flows themselves security-critical. A breach here is not just an incident — it is a reportable event with mandatory timelines, and regulators read post-mortems. Every finding we deliver is annotated with the control domain it maps to, so your compliance team can slot the report into an existing audit file instead of translating it.

What we typically find in FinTech

The findings that repeat across FinTech assessments: race conditions on transfer endpoints that double-credit balances, webhook receivers that accept unsigned or replayed processor callbacks, and IDORs on statements, payees, and transaction history. OAuth flows into banking aggregators regularly misconfigure redirect URIs or state parameters, and ledger APIs frequently trust amounts supplied by the client rather than recomputed server-side. Refund and credit-note endpoints — rarely load-tested for abuse — are a consistent source of direct-loss findings.

What the report includes

Every verified finding with a reproducible proof-of-concept: the exact request sequence, the role it ran under, and the data or action it reached.

Severity rated on impact in your sector — funds moved, records exposed, tenants crossed — not a generic CVSS guess.

Remediation guidance per finding, written for the team that will implement the fix, plus a re-test window to verify each patch.

An executive summary your leadership and security questionnaire reviewers can read without a security background.

FinTech assessment FAQ

Do you test against production or staging?

Preferably a production-like staging environment with realistic data and integrations. Where only production exists, testing is scheduled and scoped so transaction flows are never put at risk.