CVE-2025-66171

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Apache Cloudstack

PublishedMay 8, 2026

First seenMay 8, 2026

Weakness typeCWE-359CWE-359

How to fix

Update

apache cloudstack4.22.0.1 or later

Vendor advisories

lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm

Affected products

Product	Affected versions	Fixed in
apache cloudstack	4.21.0.0 ≤ v < 4.22.0.1	4.22.0.1

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