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.
Metrics
CVSS 3.1 6.5/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache CloudStack | >= 4.21.0.0, <= 4.22.0.0 |
References
- https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/09/2Mailing List, Third Party Advisory
Timeline
- Published
- May 8, 2026
- Last modified
- Oct 7, 2026
- NVD status
- Analyzed