Pentesting Fintech: The 7Camber Advantage

Fintech moves fast. Attackers move faster. Whether you’re launching a payments product, scaling an API‑first banking platform, or hardening mobile apps, pentesting is now a strategic control—not a side task. At 7Camber, we help fintech companies strengthen security, satisfy regulators, and ship with confidence. Our team has delivered penetration tests and regulated threat‑led exercises for organizations in 20+ countries, covering both regulatory and elective scopes (PCI‑DSS, DORA/TLPT, ISO, web, mobile, API, internal network, external network, and cloud).

In this guide, we’ll walk through how pentesting fintech should work in practice—where risk hides in payments, what regulators and schemes expect, and how 7Camber turns test results into real risk reduction.

Why fintech needs a dedicated pentesting approach

Fintech platforms blend the risk profile of banking (high‑value transactions and regulated data) with the velocity and openness of modern software (public APIs, mobile apps, cloud services). That unique mix creates an attack surface that cannot be secured by generic testing alone. Standards and regulators reinforce this reality:

DORA (EU Digital Operational Resilience Act) requires regular resilience testing for all in‑scope financial entities and threat‑led penetration testing (TLPT) for selected significant entities, shifting expectations from “find vulnerabilities” to prove resilience under real‑life threats.
Open Banking implementations in the UK and EU emphasize hardened authorisation profiles, strong client auth (mTLS/private_key_jwt), and security conformance—shaping how fintech APIs must be built and tested.
PSD2/RTS for SCA mandates multi‑factor authentication and dynamic linking for payments, which must be validated end‑to‑end during testing.
The OWASP Top 10 (2025) and OWASP API Security Top 10 continue to document the most common (and costly) failure modes across web and API stacks (e.g., broken access control/BOLA, cryptographic failures, insecure design).

Bottom line: Fintech pentesting must be threat‑informed, regulator‑aware, and API/mobile‑centric—performed by testers who can speak both engineering and regulatory language. That’s exactly how 7Camber works.

What 7Camber offers fintech teams

1) Full‑stack pentesting for modern fintech

API Pentesting (REST/GraphQL/Open Banking)
We test authorisation, object/property‑level access, rate limits, schema validation, and business‑flow abuse across partner and customer endpoints. Our approach aligns with industry standard risks and security profiles typical of banking and fintech.
Mobile App Pentesting (iOS/Android)
We validate local storage, jailbreak/root detection, certificate pinning, token handling, secure enclave/keystore usage, and back‑end API authorisations amongst others.
Web App Pentesting
Web apps are tested against OWASP Top 10 (2025) and business‑logic abuse; cloud reviews focus on identity boundaries, secrets, and misconfigurations that make lateral movement trivial.
Network Pentesting (External & Internal)
We emulate the attacker journey from exposed perimeter services to internal pivoting, validating segmentation and detection.
Vulnerability Assessment & Continuous Hygiene
Where appropriate, we pair deep manual testing with focused scanning to give you a prioritised remediation plan.

2) Regulatory pentesting and TLPT

PCI‑DSS Pentesting that validates the effectiveness of security controls, verifies network segmentation, identifies exploitable weaknesses and generates audit-ready evidence. We simulate real‑world attacks on the Cardholder Data Environment (CDE) assets to identify security weaknesses that could expose payment data. The team manually probe systems and controls to uncover exploitable vulnerabilities that automated scanners may miss, validating whether PCI‑DSS security measures are functioning effectively aligned to cardholder data environments and payment flows.
DORA TLPT / TIBER‑EU exercises in a DORA TLPT are intelligence‑led red‑team attacks against live production systems supporting critical and important functions to assess how well the organisation detects, contains, and withstands real‑world threat scenarios. We execute realistic, regulator‑supervised attack paths over an extended engagement to validate digital operational resilience across people, processes, and technology.

3) Industry fluency and clear reporting

7Camber’s reports are designed for dual audiences: engineers (proof‑of‑concept, exploit chains, reproduction steps) and business owners (risk language, regulatory mapping, prioritised fixes). We help your teams understand what to fix first and why—and we stay available for retesting and remediation workshops.

Our methodology (threat‑informed, regulator‑aware)

Scope & objectives. We define fintech‑specific objectives: payment initiation abuse, consent tampering, account takeover, fraud‑enabling logic flaws, and data exfiltration paths. For regulated engagements (e.g., DORA TLPT), we align with applicable guidance on scoping CIFs, secrecy for blue team, and regulator interaction.

Recon & modeling. We inventory APIs (public, partner, internal), enumerate mobile↔API linkages, and map cloud trust relationships

Exploitation & chaining. We chain smaller issues into impactful scenarios:

Weak object‑level checks → data disclosure → credential stuffing → payment manipulation (blocked by dynamic linking if correctly implemented).
Mobile token theft via notification abuse/hooking → API calls as victim → bypasses if token binding/cert pinning absent.

Purple teaming & knowledge transfer. We emulate realistic TTPs (e.g., MITRE Mobile techniques for credential access, defense evasion), then run collaborative debriefs so SOC and engineering teams internalize detections and controls.

Regulatory mapping & evidence. Findings are mapped to relevant requirements (PCI data protection principles; DORA testing outcomes). For Open Banking, we flag deviations from security profile expectations and advise on pathways to conformance.

What we test (and why it matters for fintech)

APIs and microservices

Authorisation and tenancy boundaries: We verify that tokens are not enough; ownership checks must be enforced per object and field. These are top drivers of fintech data leaks.
Unrestricted resource consumption and mass assignment equivalents: We test rate limits, schema enforcement, and deserialisation.

Mobile apps (iOS/Android)

Local secrets & token safety: No credentials in logs, preferences, or backups; proper keychain/keystore usage.
Runtime protections: Tamper detection, jailbreak/root detection, and certificate pinning to defeat MiTM.
Mobile‑to‑API security: Binding tokens to devices/sessions; handling refresh/rotation safely; defending app‑to‑app flows.

Payments and SCA (PSD2/RTS)

Dynamic linking: We test that the user approval is cryptographically tied to amount and payee, so tampering is detected.
Exemptions & risk scoring: We validate friction‑reduction controls don’t undercut security.

Web

OWASP Top 10 (2025) plus business‑logic abuse: modern injection and cryptographic failures remain prevalent.
Enforcing Proper Authorisation: Detect horizontal (same role, different resource) and vertical (privilege escalation) access control flaws.
Eliminate dangerous inputs: Assess server‑side validation and sanitisation across all entry points to prevent injection and logic abuse.

Deliverables you can act on

Executive brief summarising risk themes, business impact, and regulatory alignment.
Technical report with exploit paths, replayable PoCs (where safe), likelihood/impact scoring, and prioritised remediation.
Regulatory appendices (e.g., PCI, DORA testing evidence, Open Banking security profile notes).
Retest to validate fixes and provide auditable closure.

7Camber designs reports that inform leadership and accelerate engineering fixes, rather than gather dust

DORA TLPT vs. “standard” pentesting: what’s different?

Scope & realism. A red‑team conducts a TLPT using current threat intelligence, attacking live production systems that support critical and important functions (CIFs), while keeping the Blue Team unaware and involving regulators in scoping. It measures detection, containment, and recovery, not just vulnerability presence. Selected entities must run TLPT at least every three years under DORA, while all entities maintain an annual testing program.

7Camber’s role. We conduct TIBER‑aligned TLPT for eligible clients, orchestrating control/white/blue teams, ensuring evidence quality, and delivering a structured purple‑team phase for durable improvement.

Open Banking & PSD2/RTS: how we test what matters

Open Banking implementations generally adopt the FAPI security profile with hardened OAuth/OIDC, mTLS, and proof‑of‑possession tokens. Pentesting confirms that:

Clients authenticate correctly (no legacy weak client_secret flows in production),
Tokens are bound and scopes match consent,
Redirection and decoupled flows don’t open the door to interception or token leakage, and
Error handling never leaks sensitive data.

We validate multi‑factor auth and crypto dynamic linking from UX to cryptography. We do this to ensure the amount/payee cannot be altered after user approval.

OWASP & MITRE: why we ground tests in open standards

We align tests to OWASP Top 10 (2025) for web and to the evolving OWASP API Security risks for APIs, so your engineering teams can anchor fixes in reputable, community‑maintained guidance. For mobile, we trace coverage to MITRE ATT&CK Mobile tactics/techniques, making detections and defense design observable and testable.

What great outcomes look like

Fewer criticals in prod thanks to pre‑release pentests in CI/CD gates.
Faster audits with pentest evidence aligned to regulatory expectations (PCI, DORA TLPT).
Tighter fraud defenses via abuse‑case testing (account takeover, consent replay, payment manipulation) verified end‑to‑end with SCA.
Measurable resiliency as SOC detections evolve from purple‑team sessions grounded in MITRE ATT&CK Mobile and API‑centric adversary tradecraft.

Why fintechs choose 7Camber

Experience that travels well. Our team served clients across 20+ countries since 2015, spanning regulated and elective pentests for web, mobile, APIs, networks, and cloud.
Methodology that goes beyond checkbox testing. From API abuse chains and mobile runtime tampering to TLPT under DORA/TIBER‑EU, we build tests that reflect how attackers actually work.
Clear, actionable reporting. Findings mapped to standards and controls, with guidance your engineers can implement fast.

Next step: If you’re planning a release, audit, funding round, or regulator‑supervised test, speak with us early. We’ll scope a pentest that fits your risk profile—and your timelines.

Frequently asked questions (fintech pentesting)

1) How often should we pentest a fintech platform?
At least annually and after major changes for core systems is a strong baseline; DORA requires an annual testing program for all in‑scope entities, and TLPT every three years for selected significant entities.

2) What’s the difference between a vulnerability scan and a pentest?
A scan finds known issues automatically; a pentest adds human‑led exploitation, chaining, and business‑logic testing—essential for fintech APIs and payment flows. (We use targeted scanning to support, not replace, manual testing.) It is important to note that vulnerability scanners often cannot even handle surface-level issues such as authentication mechanisms too well. As a consequence they could report that everything is fine simply because they cannot visualise or access the whole attack surface.

3) Do we need a pentest for PCI DSS or SOC 2?
PCI environments expect evidence of robust testing around cardholder data flows. SOC 2 doesn’t explicitly mandate pentesting, but auditors and customers increasingly expect it as proof that controls are effective.

4) Can a pentest actually ‘bring down’ my systems or cause me downtime?
It is important to note that NO dangerous manoeuvers are ever attempted on production systems during our tests without explicit permission and live co-ordination with clients. Even in TLPT situations where the defending client Blue Team is not aware of an attack, our Red Team approach would have liaised very closely with the client’s Control Team (White Team) in advance..

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