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    CVE-2025-11720

    The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability was fixed in Firefox 144.

    Published:Oct 14, 2025
    Last Modified:Apr 20, 2026
    EPS:Oct 14, 2025
    EPSS Score:0.00043
    CVSS Score:8.1

    Affected Products

    Vendor
    Google
    Product
    Android
    Vendor
    Mozilla
    Product
    Firefox

    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