GCP Security Configuration Review and Best Practices

This report outlines HackerOne’s GCP testing methodology and common cloud security issues—permission/IAM misconfigurations, VPC firewall problems, and logging/monitoring gaps—emphasizing least-privilege, careful scoping, and skills-based tester matching. It includes an April 2024 case study where a publicly exposed Google Cloud Storage bucket leaked 37,349 PII records (names, emails, home addresses) affecting individual customers and accounts tied to large organizations, underscoring the impact of misconfigured cloud storage.