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    CVE-2026-34213

    Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.

    Published:Apr 14, 2026
    Last Modified:Apr 22, 2026
    EPS:Apr 14, 2026
    EPSS Score:0.0004
    CVSS Score:5.4

    Affected Products

    Vendor
    Docmost
    Product
    Docmost

    Exploits

    https://github.com/0xmrma/CVE-2026-34213

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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