Disclosure summary
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.
Source-reported weakness categories
CWE-359
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-66172
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| apache | cloudstack | * {"versionStartIncluding":"4.21.0.0","versionEndExcluding":"4.22.0.1"} |
Original records & references
- NIST NVD record
- CVE Program record
- lists.apache.org — Mailing List, Third Party Advisory
PUBLISHED 2026-05-08T09:16:35-04:00
MODIFIED 2026-10-07T05:10:00-04:00
INGESTED 2026-10-08T12:40:22-04:00