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    CVE-2025-66500

    A stored cross-site scripting (XSS) vulnerability exists in webplugins.foxit.com. A postMessage handler fails to validate the message origin and directly assigns externalPath to a script source, allowing an attacker to execute arbitrary JavaScript when a crafted postMessage is received.

    Published:Dec 19, 2025
    Last Modified:Dec 23, 2025
    EPS:Dec 19, 2025
    EPSS Score:0.00032
    CVSS Score:6.3

    Affected Products

    Vendor
    Foxit
    Product
    Pdf Editor Cloud
    Vendor
    Foxitsoftware
    Product
    Webplugins

    Exploits

    No exploit reference

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    CVE-2025-66521 (CVSS 6.3) — A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Trusted Certificate…
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    CVE-2025-66519 (CVSS 6.3) — A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Layer Import functi…
    CVE-2025-66502 (CVSS 6.3) — A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Page Templates feat…
    CVE-2025-66501 (CVSS 6.3) — A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Predefined Text fea…

    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