PT-2026-38915 · Cloudstack · Cloudstack Backup

Gabriel Pordeus · Published 2026-05-08 · Updated 2026-05-10 · CVE-2025-66172

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions CloudStack Backup plugin versions 4.21.0.0 through 4.22.0.0

Description The CloudStack Backup plugin contains improper access logic. Authenticated users in environments where this plugin is enabled can access specific APIs to restore a volume from another user's backups and attach that volume to their own virtual machines.

Recommendations Upgrade to version 4.22.0.1.

Fix

Weakness Enumeration

CWE-359

Related Identifiers

CVE-2025-66172

Affected Products

Cloudstack Backup

References · 7

• https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66172 · Security Note
• https://t.me/cveNotify/162946 · Telegram Post
• http://openwall.com/lists/oss-security/2026/05/09/3 · Note
• https://twitter.com/VulmonFeeds/status/2052770864953708797 · Twitter Post
• https://t.me/cveNotify/162858 · Telegram Post
• https://twitter.com/CVEnew/status/2053174676109607065 · Twitter Post