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 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 upgr

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 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 upgr

Affected

• cpe apache/cloudstackversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2025-66172

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2025-66172

  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'

  nvd.nist.gov

References

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