FinTech

Payments, lending, and brokerage stacks tested by researchers who chain auth, money-movement, and OAuth flows the way attackers do.

Three named threats we test for

1. 01

   Card-data exfil via business-logic abuse

   Pricing rules, refund overrides, and tokenisation gaps that let an attacker pull cardholder data without ever breaking PCI cryptography.

2. 02

   Refund-flow race conditions

   Settlement, dispute, and reversal endpoints raced against each other to double-spend, settle phantom transactions, or break ledger reconciliation.

3. 03

   OAuth callback hijack across linked accounts

   Account-linking and SSO flows tested for state-binding gaps, open-redirect chains, and partner-app trust abuse that surface real fraud paths.

1. 01

   Scope and threat-model

   Engagement lead walks the platform with your engineering and risk owners. Outcome is a written threat model, not a checklist.

2. 02

   Manual exploitation

   Researchers attack the auth chain, money-movement endpoints, and partner integrations by hand. Tools assist, they do not lead.

3. 03

   Chained-finding write-up

   Every report shows the path from entry to impact, with reproduction steps a developer can replay on a laptop.

4. 04

   Retest and sign-off

   Fixes are retested against the original exploit chain, not just the patched endpoint. CISO gets a signed letter for the audit file.