CVE-2025-66171
Last modified
CVE-2025-66171 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Cloudstack | >= 4.21.0.0, < 4.22.0.1 |
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
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-66171?
How severe is CVE-2025-66171?
How do I fix CVE-2025-66171?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-66166Missing Authorization vulnerability in merkulove Lottier for…5.4
- CVE-2025-66167Missing Authorization vulnerability in merkulove Lottier lot…5.4
- CVE-2025-66168WARNING: Users of 6.x should upgrade to 6.2.4 or later as t…8.8
- CVE-2025-66169Cypher Injection vulnerability in Apache Camel camel-neo4j c…5.3
- CVE-2025-6617A vulnerability was found in D-Link DIR-619L 2.06B01 and cla…8.8
- CVE-2025-66170The CloudStack Backup plugin has an improper authorization l…6.5
- CVE-2025-66172The CloudStack Backup plugin has an improper access logic in…8.1
- CVE-2025-66173There is a privilege escalation vulnerability in some Hikvis…6.2
- CVE-2025-66174There is an improper authentication vulnerability in some Hi…6.8
- CVE-2025-66176There is a Buffer overflow Vulnerability in the device Searc…8.8
- CVE-2025-66177There is a Buffer overflow Vulnerability in the device Searc…8.8
- CVE-2025-66178A improper neutralization of special elements used in an os …7.2
Are you affected by CVE-2025-66171?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST