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    CVE-2026-45543

    Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.

    Published:Jun 1, 2026
    Last Modified:Jun 4, 2026
    EPS:Jun 1, 2026
    EPSS Score:0.00027
    CVSS Score:5.3

    Affected Products

    Vendor
    Nextcloud
    Product
    Forms

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-150 Collect Data from Common Resource Locations
    CAPEC-639 Probe System Files

    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