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    CVE-2025-64781

    In GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1, "External page display restriction" is set to "Do not limit" in the initial configuration. With this configuration, the user may be redirected to an arbitrary website when accessing a specially crafted URL.

    Published:Dec 12, 2025
    Last Modified:Feb 17, 2026
    EPS:Dec 12, 2025
    EPSS Score:0.00037
    CVSS Score:4.7

    Affected Products

    Vendor
    Groupsession
    Product
    Groupsession
    Vendor
    Groupsession
    Product
    Groupsession Bycloud
    Vendor
    Groupsession
    Product
    Groupsession Zion

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

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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