Payment flows & business logic
Assess how transactions, account interactions, and checkout flows behave, using controlled test accounts and transactions to validate findings.
Fintech security assessments
Looks secure.
Let’s find out.
Security assessments for fintech companies, payment platforms, and checkout providers. We test an agreed scope of systems and payment flows to find vulnerabilities and explain their business impact.
Discuss an assessment01 / Expertise
Real systems.
Real consequences.
Our research has uncovered critical flaws that allowed money to be transferred from other users’ accounts without their credentials or approval. We’ve also found ways to access private customer data, alter other users’ invoices, and complete purchases for a fraction of the intended price.
Applications & integrations
Test the applications and APIs within your agreed scope, including the connections between your product and its payment providers.
Findings & remediation guidance
Receive a clear assessment report covering the vulnerabilities found, their business impact, and practical recommendations for addressing them.
02 / Approach
Define the scope.
Get clear answers.
LSP works directly with your team to assess a defined set of systems and deliver findings you can act on. The work draws on years of vulnerability research and bug bounty experience.
Agree the scope
Define the systems, payment flows, objectives, and testing boundaries together before the assessment begins.
Assess the systems
Examine behavior and business logic within that scope, and validate the security impact through controlled testing.
Report the findings
Explain each finding, its impact, and recommended next steps so your team can prioritize fixes.
03 / Contact
Something worth
a closer look?
Discuss an assessment of your fintech product, checkout flow, or payment integration.
Email LSP