CVE-2025-66170: Apache CloudStack: Any user can list backups that they should not have access to

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-08 · updated 2026-10-07
Weakness: CWE-863

Description

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.

Affected products

Apache Software Foundation Apache CloudStack: from 4.21.0.0 before 4.22.0.1 — fixed in 4.22.0.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache CloudStack 4.22.0.1. Check the vendor advisory for mitigations.

References

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