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.
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History
Sat, 09 May 2026 07:30:00 +0000
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| 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 | |
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Status: PUBLISHED
Assigner: apache
Published: 2026-05-08T12:13:18.311Z
Updated: 2026-05-09T06:43:01.212Z
Reserved: 2025-11-22T19:27:07.615Z
Link: CVE-2025-66172
Updated: 2026-05-09T06:43:01.212Z
Status : Undergoing Analysis
Published: 2026-05-08T13:16:35.607
Modified: 2026-05-09T07:16:08.470
Link: CVE-2025-66172
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