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    CVE-2020-36941

    Knockpy 4.1.1 contains a CSV injection vulnerability that allows attackers to inject malicious formulas into CSV reports through unfiltered server headers. Attackers can manipulate server response headers to include spreadsheet formulas that will execute when the CSV is opened in spreadsheet applications.

    Published:Jan 27, 2026
    Last Modified:Mar 24, 2026
    EPS:Jan 27, 2026
    EPSS Score:0.00065
    CVSS Score:9.8

    Affected Products

    Vendor
    Guelfoweb
    Product
    Knock
    Vendor
    Guelfoweb
    Product
    Knockpy
    Vendor
    Verbb
    Product
    Knock Knock

    Exploits

    https://www.exploit-db.com/exploits/49342

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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