CVE-2025-66171

MEDIUM

Apache CloudStack: Any user can create a new VM from backups they should not have access to

Title source: cna
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 6.5
EPSS 0.0002
EPSS Percentile 3.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-359
Status published
Products (2)
apache/cloudstack 4.21.0.0 - 4.22.0.1
Apache Software Foundation/Apache CloudStack 4.21.0.0 - 4.22.0.0
Published May 08, 2026
Tracked Since May 08, 2026