High severity8.1NVD Advisory· Published May 8, 2026· Updated May 12, 2026
CVE-2025-66172
CVE-2025-66172
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.
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Affected products
2- Range: >=4.21.0.0, <4.22.0.1
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/05/09/3nvdMailing ListThird Party Advisory
- lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmnvdMailing ListThird Party Advisory
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