Medium severity6.5NVD Advisory· Published May 8, 2026· Updated May 12, 2026
CVE-2025-66171
CVE-2025-66171
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.
AI Insight
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Affected products
2cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*range: >=4.21.0.0,<4.22.0.1
- (no CPE)range: 4.21.0.0, 4.22.0.0
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/05/09/2nvdMailing ListThird Party Advisory
- lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmnvdMailing ListThird Party Advisory
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