CVE-2025-66170
Analyzed Analyzed - Analysis Complete
Improper Authorization in CloudStack Backup Plugin

Publication date: 2026-05-08

Last updated on: 2026-05-11

Assigner: Apache Software Foundation

Description
The CloudStack Backup plugin has an improper authorization 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 has access to specific APIs can list backups from any account in the environment. This vulnerability does not allow them to see the contents of the backup. Users are recommended to upgrade to version 4.22.0.1, which fixes the issue.
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Meta Information
Published
2026-05-08
Last Modified
2026-05-11
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2025-66170
EUVD
EUVD-2025-209740
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
apache cloudstack From 4.21.0.0 (inc) to 4.22.0.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

The CloudStack Backup plugin in versions 4.21.0.0 and 4.22.0.0 has an improper authorization logic vulnerability. This means that any authenticated user in a CloudStack environment with this plugin enabled can list backups from any account, even those they do not own.

However, this vulnerability does not allow users to view the actual contents of the backups, only the list of backups.

Compliance Impact

The vulnerability allows any authenticated user in CloudStack environments with the affected Backup plugin versions to list backups from any account. Although the contents of the backups cannot be viewed, the ability to enumerate backups across accounts may lead to unauthorized exposure of metadata or account information.

This improper authorization could potentially impact compliance with standards such as GDPR or HIPAA, which require strict controls on access to personal or sensitive data and auditability of access. Unauthorized listing of backups may violate principles of least privilege and data confidentiality.

Users are advised to upgrade to version 4.22.0.1 to remediate this issue and help maintain compliance.

Impact Analysis

This vulnerability can impact you by allowing unauthorized users with valid accounts to enumerate backups from other accounts within the CloudStack environment. This could lead to information disclosure about the existence and metadata of backups.

Although the contents of the backups are not exposed, knowing which backups exist could aid an attacker in planning further attacks or gaining insights into the environment's backup practices.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade the CloudStack Backup plugin to version 4.22.0.1, which fixes the improper authorization logic issue.

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