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    CVE-2025-66689

    A path traversal vulnerability exists in Zen MCP Server before 9.8.2 that allows authenticated attackers to read arbitrary files on the system. The vulnerability is caused by flawed logic in the is_dangerous_path() validation function that uses exact string matching against a blacklist of system directories. Attackers can bypass these restrictions by accessing subdirectories of blacklisted paths.

    Published:Jan 12, 2026
    Last Modified:Jan 22, 2026
    EPS:Jan 12, 2026
    EPSS Score:0.00048
    CVSS Score:6.5

    Affected Products

    Vendor
    Beehiveinnovations
    Product
    Zen Mcp Server
    Vendor
    Busymac
    Product
    Pal Mcp Server

    Exploits

    https://github.com/BeehiveInnovations/zen-mcp-server/issues/293https://github.com/Team-Off-course/MCP-Server-Vuln-Analysis/blob/main/CVE-2025-66689.md

    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