CVE-2025-66172
Apache CloudStack: Any user can attach a volume in their VMs from backups they should not have access to
- State
- Published
- Severity
- 8.1 High
- Published
- May 8, 2026
- Updated
- May 10, 2026
- Reserved
- Nov 22, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | CISA-ADP |
Weaknesses
- CWE-359 Exposure of Private Personal Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
Apache CloudStackApache Software Foundation |
|
References
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