CVE-2025-66171
Medium · 6.5CVSS
6.5
EPSS
0.5%
Published
May 8, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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