CVE-2025-66172

EUVD-2025-209742

08.05.2026, 13:16

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
apache	CNA	6.5 MEDIUM	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
apache	cloudstack	4.21.0.0 ≤ 𝑥 ≤ 4.22.0.0	CNA

Common Weakness Enumeration

CWE-359 - 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.

Vulnerability Media Exposure

[GERMAN] Apache CloudStack: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Apache CloudStack ausnutzen, um beliebigen Programmcode auszuführen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, und um Dateien zu Manipulieren.
Published: 2026-05-07T22:00:00+00:00

References

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