CVE-2025-66510

Nextcloud Server Contacts Search allowed users to retrieve contact information of other users beyond their contact list

Published Dec 5, 2025 CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud nextcloud
Nextcloud nextcloud Enterprise Server
Nextcloud nextcloud Server
Nextcloud server
Vendors & Products Nextcloud
Nextcloud nextcloud
Nextcloud nextcloud Enterprise Server
Nextcloud nextcloud Server
Nextcloud server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Nextcloud Server Contacts Search allowed users to retrieve contact information of other users beyond their contact list
Weaknesses CWE-359
References
Metrics cvssV3_1

{'score': 4.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Dec 5, 2025, 8:02 PM
Reserved
Dec 3, 2025, 3:12 PM
Status
Analyzed
Published
Dec 5, 2025, 5:16 PM
Modified
Oct 18, 2026, 2:10 PM