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Message-ID: <3316efb8-7087-4730-b42b-5a1e9de09128@apache.org>
Date: Fri, 8 May 2026 14:10:31 +0200
From: "Piotr P. Karwasz" <pkarwasz@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2025-66171: Apache CloudStack: Any user can create a new VM from
backups they should not have access to
Severity: important
Affected versions:
- Apache CloudStack 4.21.0.0 through 4.22.0.0
Description:
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 create new VMs using backups of any other
user of the environment.
Backup plugin users using CloudStack 4.21.0.0+ are recommended to
upgrade to CloudStack version 4.22.0.1, which fixes this issue.
Credit:
Fabricio Duarte <fabricio.duarte.jr@...il.com> (reporter)
Gabriel Ortiga Fernandes <gabriel.ortiga@...mail.com> (reporter)
Gabriel Pordeus Santos <gabrielpordeus@...il.com> (reporter)
References:
https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm
https://cloudstack.apache.org/
https://www.cve.org/CVERecord?id=CVE-2025-66171
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