CVE-2025-66171

Published: May 8, 2026Modified: Jun 17, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.8 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (1)

Products: Apache: Cloudstack

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Apache Cloudstack	From 4.21.0.0 to 4.22.0.1

Related CWEs

Exposure of Private Personal Information to an Unauthorized Actor

The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected.

References (2)

https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm

Source: security@apache.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2026/05/09/2

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.