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    CVE-2025-66510

    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.

    Published:Dec 5, 2025
    Last Modified:Dec 10, 2025
    EPS:Dec 5, 2025
    EPSS Score:0.00023
    CVSS Score:4.5

    Affected Products

    Vendor
    Nextcloud
    Product
    Nextcloud
    Vendor
    Nextcloud
    Product
    Nextcloud Enterprise Server
    Vendor
    Nextcloud
    Product
    Nextcloud Server
    Vendor
    Nextcloud
    Product
    Server

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High