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.
History

Fri, 08 May 2026 13:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Apache CloudStack: Any user can attach a volume in their VMs from backups they should not have access to
Weaknesses CWE-359
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-05-08T12:13:18.311Z

Reserved: 2025-11-22T19:27:07.615Z

Link: CVE-2025-66172

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-08T13:16:35.607

Modified: 2026-05-08T13:16:35.607

Link: CVE-2025-66172

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.