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    CVE-2025-26621

    OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.5.2, any user with the capability manage customizations can edit webhook that will execute javascript code. This can be abused to cause a denial of service attack by prototype pollution, making the node js server running the OpenCTI frontend become unavailable. Version 6.5.2 fixes the issue.

    Published:May 19, 2025
    Last Modified:Aug 6, 2025
    EPS:May 19, 2025
    EPSS Score:0.00098
    CVSS Score:7.6

    Affected Products

    Vendor
    Citeum
    Product
    Opencti
    Vendor
    Opencti-platform
    Product
    Opencti

    Exploits

    No exploit reference

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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