The Silent Attackers: Exploiting VPC Endpoints to Expose AWS Accounts of S3 Buckets Without a Trace
Varonis, Thursday, October 30th, 2025
Learn how a CloudTrail flaw revealed IDs via VPC endpoints and how to protect your cloud.
Leaking an AWS account ID might seem harmless, but it can pose a security threat, resulting in different attack paths. Because of the risk, keeping your AWS account ID out of service names, infrastructure, or public-facing resources is strongly advised.
While exposing an account ID does not provide a direct attack path, it can still aid attackers in identifying vulnerable misconfigurations, escalating privileges, brute-forcing IAM usernames, and validating their existence based on differences in AWS error messages.