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    CVE-2025-66557

    Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.

    Published:Dec 5, 2025
    Last Modified:Dec 9, 2025
    EPS:Dec 5, 2025
    EPSS Score:0.00027
    CVSS Score:5.4

    Affected Products

    Vendor
    Nextcloud
    Product
    Deck

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    Related CVEs

    CVE-2025-66548 (CVSS 3.3) — Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for tea…
    CVE-2024-37883 (CVSS 4.3) — Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for tea…
    CVE-2024-22213 (CVSS 0) — Deck is a kanban style organization tool aimed at personal planning and project organization for teams integra…
    CVE-2023-22471 (CVSS 3.5) — Deck is a kanban style organization tool aimed at personal planning and project organization for teams integra…
    CVE-2023-22470 (CVSS 3.5) — Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for tea…
    CVE-2023-22469 (CVSS 5.8) — Deck is a kanban style organization tool aimed at personal planning and project organization for teams integra…
    CVE-2022-24906 (CVSS 3.5) — Nextcloud Deck is a Kanban-style project & personal management tool for Nextcloud, similar to Trello. The full…
    CVE-2022-29159 (CVSS 5) — Nextcloud Deck is a Kanban-style project & personal management tool for Nextcloud. In versions prior to 1.4.8,…
    CVE-2021-39225 (CVSS 8.1) — Nextcloud is an open-source, self-hosted productivity platform. A missing permission check in Nextcloud Deck b…
    CVE-2021-37631 (CVSS 6.5) — Deck is an open source kanban style organization tool aimed at personal planning and project organization for …

    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