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Knowledge Base & Operational DocumentationHow to Protect API Webhooks From Requests Sent by Unknown Sources
A publicly reachable webhook can receive forged requests if the endpoint trusts any caller. Attackers may replay events, trigger unauthorized changes, or flood processing queues.
What to check
Review provider signature validation, timestamp tolerance, secret rotation, request size limits, replay protection, rate limits, and logging. Confirm signature checks cover the raw request body and are enforced before processing.
Recommended next step
Validate the provider’s documented signature or mutual authentication method, reject stale or repeated events, and process only expected event types. Rotate shared secrets through a tested procedure and monitor rejected traffic.
How Informatix Systems can help
Informatix Systems provides custom software, API integration, and application security services. We can assess the affected setup, trace the issue through relevant systems, and help plan a practical solution. Contact us with the platform involved, when the issue began, and non-sensitive error details.