VulnerabilityAnalyzed
CVE-2025-66171
The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0.
MEDIUM 6.5EPSS 0.53%
Does this matter?
Lower severity and a low EPSS score (0.53%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.53% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-359
- Affected
- apache/cloudstack
- Source
- security@apache.org
References
- https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/09/2Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.