CVE-2025-66172CWE-359

CVE-2025-66172

High · published May 8, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
42.8
In the wild
Unconfirmed
What it is

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 restore a volume from any other user's backups and attach the volume to their own VMs.

Backup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00512 · 42.8th percentile
Weakness
CWE-359 · Exposure of Private Personal Information to an Unauthorized Actor
Published
2026-05-08T17:16Z
Affected products (1)
ProductVersionsFixed in
apache/cloudstack≥ 4.21.0.0, < 4.22.0.14.22.0.1
References (2)
https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm · [email protected]http://www.openwall.com/lists/oss-security/2026/05/09/3 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 08 MAY 12:13Z
    Apache CloudStack: Any user can attach a volume in their VMs from backups they should not have access to
    cvelistv5