CVE-2025-66170

MediumCVSS 6.5

Published: 08/05/2026(UTC)Updated: 07/10/2026(UTC)Translated: 01/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.35%

27th percentile - higher than 27% of all known CVEs

Summary

The CloudStack Backup plugin has improper authorization logic in versions 4.21.0.0 and 4.22.0.0. Any authenticated user with access to specific APIs can list backups from any account, but cannot see the contents.

Risk Assessment

Risk of exposing backup metadata, which could aid in planning attacks.

Recommendation

Upgrade to version 4.22.0.1, which fixes the issue.

Other vulnerabilities in CloudStack

CVE-2025-66171Medium
The CloudStack Backup plugin has improper access logic in versions 4.21.0.0 and 4.22.0.0. Any authenticated user with access to specific APIs can create new VMs using backups of any other user.

Original NVD description (English source)

The CloudStack Backup plugin has an improper authorization 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 has access to specific APIs can list backups from any account in the environment. This vulnerability does not allow them to see the contents of the backup. Users are recommended to upgrade to version 4.22.0.1, which fixes the issue.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS