---
id: CVE-2025-66170
title: >-
  The CloudStack Backup plugin has an improper authorization logic in versions
  4.21.0.0 and 4.22.0.0
summary: >-
  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 specif…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-863
vendor: apache
product: cloudstack
affected:
  - 'cloudstack >= 4.21.0.0, < 4.22.0.1'
patched:
  - cloudstack 4.22.0.1
published: '2026-05-08'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T22:10:00.273'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66170'
references:
  - url: 'https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/05/09/1'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00486
epssPercentile: 0.39535
ingestedAt: '2026-09-30T22:27:27.784Z'
---

## Overview

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.

## Affected

- `cloudstack >= 4.21.0.0, < 4.22.0.1`

## Remediation

Upgrade past the affected range:

- `cloudstack 4.22.0.1`