The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. May 8, 2026 · NIST NVD

   Detected

   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 ve

2. Oct 7, 2026 · NIST NVD

   Updated

   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 ve

Affected

• cpe apache/cloudstackversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2025-66171

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2025-66171

  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 o

  nvd.nist.gov

References

• Mailing List · openwall.com
• Mailing List · lists.apache.org