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    CVE-2023-28998

    The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure, and add new files.​ Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

    Published:Apr 4, 2023
    Last Modified:Feb 11, 2025
    EPS:Apr 4, 2023
    EPSS Score:0.00536
    CVSS Score:6.7

    Affected Products

    Vendor
    Nextcloud
    Product
    Desktop

    Exploits

    https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdfhttps://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf

    Common Weakness Enumeration

    CWE-325 Missing Cryptographic Step

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-68 Subvert Code-signing Facilities

    Related CVEs

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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