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 create new VMs using backups of any other user of the environment.

Backup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.
Published: 2026-05-08
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Tue, 12 May 2026 13:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*

Sat, 09 May 2026 07:30:00 +0000

Type Values Removed Values Added
References

Fri, 08 May 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache cloudstack
Vendors & Products Apache
Apache cloudstack

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 create new VMs using backups of any other user of the environment. 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 create a new VM from backups they should not have access to
Weaknesses CWE-359
References

Subscriptions

Apache Cloudstack
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-05-09T06:42:59.830Z

Reserved: 2025-11-22T19:26:43.923Z

Link: CVE-2025-66171

cve-icon Vulnrichment

Updated: 2026-05-09T06:42:59.830Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T13:16:35.483

Modified: 2026-05-12T13:31:00.710

Link: CVE-2025-66171

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T20:00:12Z

Weaknesses