CVE-2025-66510
low-risk
Published 2025-12-05
Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 31.0.10 and 32.0.1 and Nextcloud Enterprise Server prior to 28.0.14.11, 29.0.16.8, 30.0.17.3, and 31.0.10, contacts search allowed to retrieve personal data of other users (emails, names, identifiers) without proper access control. This allows an authenticated user to retrieve information about accounts that are not related or added as contacts.
Do I need to act?
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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.5/10
Medium
NETWORK
/ LOW complexity
Affected Products (2)
Affected Vendors
26
/ 100
low-risk
Severity
19/34 · Moderate
Exploitability
0/34 · Minimal
Exposure
7/34 · Low