How severe is CVE-2025-66172?

CVE-2025-66172 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-66172 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66172?

CVE-2025-66172 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66172?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66172 have an EU (EUVD) identifier?

Yes. CVE-2025-66172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209742.

When was CVE-2025-66172 published?

CVE-2025-66172 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2025-66172

CVE-2025-66172 is a high-severity vulnerability in Apache Cloudstack with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-359.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209742
Weakness: CWE-359
Affected product: Apache Cloudstack
Published: 2026-05-08
Last modified: 2026-06-17

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 restore a volume from any other user's backups and attach the volume to their own VMs. Backup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.

Frequently asked questions

What is CVE-2025-66172?: 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 restore a volume from any other user's backups and attach the volume to their own VMs. Backup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.
How severe is CVE-2025-66172?: CVE-2025-66172 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-66172 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66172?: CVE-2025-66172 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66172?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66172 have an EU (EUVD) identifier?: Yes. CVE-2025-66172 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209742.
When was CVE-2025-66172 published?: CVE-2025-66172 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Cloudstack

CVE-2012-4501 — Critical (CVSS 10.0): Citrix Cloud.com CloudStack, and Apache CloudStack pre-release, allows remote attackers to make arbitrary API calls by…
CVE-2024-39864 — Critical (CVSS 9.8): The CloudStack integration API service allows running its unauthenticated API server (usually on port 8096 when…
CVE-2024-38346 — Critical (CVSS 9.8): The CloudStack cluster service runs on unauthenticated port (default 9090) that can be misused to run arbitrary…
CVE-2024-29006 — Critical (CVSS 9.8): By default the CloudStack management server honours the x-forwarded-for HTTP header and logs it as the source IP of an…
CVE-2022-35741 — Critical (CVSS 9.8): Apache CloudStack version 4.5.0 and later has a SAML 2.0 authentication Service Provider plugin which is found to be…
CVE-2019-17562 — Critical (CVSS 9.8): A buffer overflow vulnerability has been found in the baremetal component of Apache CloudStack. This applies to all…

All CVEs affecting Apache Cloudstack →

Other CWE-359 vulnerabilities

CVE-2022-0482 — Critical (CVSS 9.1): Exposure of Private Personal Information to an Unauthorized Actor in GitHub repository alextselegidis/easyappointments…
CVE-2022-2921 — High (CVSS 8.8): Exposure of Private Personal Information to an Unauthorized Actor in GitHub repository notrinos/notrinoserp prior to…
CVE-2025-53625 — High (CVSS 8.7): The DynamicPageList3 extension is a reporting tool for MediaWiki, listing category members and intersections with…
CVE-2025-13008 — High (CVSS 8.6): An information disclosure vulnerability in M-Files Server before versions 25.12.15491.7, 25.8 LTS SR3, 25.2 LTS SR3 and…
CVE-2023-36052 — High (CVSS 8.6): Azure CLI REST Command Information Disclosure Vulnerability
CVE-2024-26192 — High (CVSS 8.2): Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

Browse all CWE-359 vulnerabilities →