CVE-2025-66172
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
The Backup plugin in CloudStack has improper access logic in versions 4.21.0.0 and 4.22.0.0. Authenticated users can restore volumes from other users' backups and attach them to their own VMs.
Risk Assessment
The organization may be exposed to unauthorized access to other users' data, potentially leading to loss of confidentiality and data integrity.
Recommendation
It is recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

