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    CVE-2025-26210

    DeepSeek R1 through V3.1 allows XSS, as demonstrated by JavaScript execution in the context of the run-html-chat.deepseeksvc.com domain. NOTE: some third parties have indicated that this is intended behavior.

    Published:Sep 3, 2025
    Last Modified:Sep 26, 2025
    EPS:Sep 3, 2025
    EPSS Score:0.00045
    CVSS Score:8.8

    Affected Products

    Vendor
    Deepseek
    Product
    Deepseek
    Vendor
    Deepseek
    Product
    Deepseek-r1
    Vendor
    Deepseek
    Product
    Deepseek-v2
    Vendor
    Deepseek
    Product
    Deepseek-v3

    Exploits

    https://hackmd.io/@MrqrFIlhQFi7vUwkqbrXDw/deepseekhttps://youtu.be/IgQwy52FVT4

    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