Cloud Infrastructure
Storage Bucket Exposure
Public cloud storage buckets remain one of the most common causes of data breaches.
What it is
Misconfigured S3 buckets, Azure Blob containers, and GCS buckets set to public access expose sensitive data — backups, credentials, PII, internal configuration files — to anyone with the URL. Even 'private' storage can be exposed through overly permissive bucket policies, pre-signed URL abuse, or cross-account access misconfigurations.
Attack techniques
- Public bucket access misconfiguration
- Overly permissive bucket policies
- Pre-signed URL abuse
- Cross-account bucket access
- Unsecured object ACLs
Business impact
Exposed storage is often discovered by attackers through automated enumeration tools before the organisation is aware. Data loss and regulatory penalty follow, with no malware involved.