Improper Authorization Logic in CloudStack Backup Plugin Affects Apache Software Foundation
CVE-2025-66170

6.5MEDIUM

Key Information:

Vendor

Apache
Status
Apache Cloudstack
Vendor
CVE Published:
8 May 2026

What is CVE-2025-66170?

The CloudStack Backup plugin features an improper authorization logic in versions 4.21.0.0 and 4.22.0.0. This issue allows authenticated users in CloudStack environments to access specific APIs, enabling them to list backups from any user account within the environment. However, it does not permit access to the contents of those backups. It is highly recommended that users upgrade to version 4.22.0.1 to mitigate this vulnerability.

Affected Version(s)

Apache CloudStack 4.21.0.0 <= 4.22.0.0

References

https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02k...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gabriel Ortiga Fernandes <gabriel.ortiga@hotmail.com>
Fabricio Duarte <fabricio.duarte.jr@gmail.com>
Gabriel Pordeus Santos <gabrielpordeus@gmail.com>
.