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    CVE-2025-66501

    A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Predefined Text feature of the Foxit eSign section. A crafted payload can be stored via the Identity “First Name” field, which is later rendered into the DOM without proper sanitization. As a result, the injected script may execute when predefined text is used or when viewing document properties.

    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
    Pdfonline

    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…
    CVE-2025-66520 (CVSS 6.3) — A stored cross-site scripting (XSS) vulnerability exists in the Portfolio feature of the Foxit PDF Editor clou…
    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…
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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