HOMEVULNERABILITIESCVE-2025-66170
MEDIUM

CVE-2025-66170

CWE-863Published: May 8, 2026· Updated: May 11, 2026

6.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.2th

Official Description

The CloudStack Backup plugin has an improper authorization 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 has access to specific APIs can list backups from any account in the environment. This vulnerability does not allow them to see the contents of the backup.

Users are recommended to upgrade to version 4.22.0.1, which fixes the issue.

NVD Source

Technical Analysis

CVE-2025-66170 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

Apache1 product
cloudstack
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm
ADVISORYhttp://www.openwall.com/lists/oss-security/2026/05/09/1

All References (2)

→
https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xmMailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2026/05/09/1Mailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2025-66170
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-863
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 8, 2026

Related CVEs (CWE-863)

CVE-2026-44330
10.0
CVE-2026-48303
10.0
CVE-2026-48286
10.0
CVE-2026-28466
9.9
CVE-2026-41050
9.9
CVE-2026-41283
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-66170 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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