Modern applications rarely operate alone. They rely on API gateways, webhooks, cloud services, SaaS platforms, and partner integrations to exchange data and automate critical business processes. These trusted connections accelerate business, but they also create additional attack surfaces that are often overlooked during traditional security assessments.
Attackers know that third-party integrations frequently operate on implicit trust. Shared API keys, long-lived credentials, overly permissive access controls, insecure webhook validation, and misconfigured API gateways can all provide opportunities to bypass security controls. In many real-world incidents, a trusted integration becomes the easiest path to sensitive systems because it's assumed to be secure by default.
At Suzu Labs, we test the trust relationships that exist between your applications and the external services they depend on. We assess API gateways, webhooks, partner connections, and machine-to-machine authentication to identify where trust boundaries can be abused. Our testing validates authentication and authorization controls, examines how shared secrets are protected, and evaluates whether attackers could leverage one trusted connection to gain broader access or escalate privileges.
Rather than stopping at configuration reviews, we simulate realistic attack paths to understand the real-world impact of these integrations. We look for opportunities to chain weaknesses together, abuse excessive permissions, manipulate webhook payloads, or pivot through trusted services into more sensitive parts of your environment.
As organizations continue to build increasingly interconnected ecosystems, third-party security is no longer optional. Regular testing of partner integrations helps ensure that the systems you trust every day don't become the attack path someone else uses to compromise your business.