CVE-2025-66172: Apache CloudStack: Any user can attach a volume in their VMs from backups they should not have access to
The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can restore a volume from any other user's backups and attach the volume to their own VMs.
Backup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-66172?
CVE-2025-66172 has a medium severity rating due to improper access controls allowing unauthorized volume attachment.
How do I fix CVE-2025-66172?
To fix CVE-2025-66172, upgrade Apache CloudStack to version 4.22.0.1 or later.
Who is affected by CVE-2025-66172?
Any user with authenticated access in Apache CloudStack versions 4.21.0.0 and 4.22.0.0 is affected by CVE-2025-66172.
What is the impact of CVE-2025-66172?
The impact of CVE-2025-66172 is that users can attach backups to their VMs without proper authorization.
Is there a known workaround for CVE-2025-66172?
Currently, there are no known workarounds for CVE-2025-66172 apart from upgrading to the latest version.