CVE-2019-9801

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    CVE-2019-9801

    Published: 26 Apr 2019Last Modified: 10 Mar 2026

    Summary:

    Details: Firefox will accept any registered Program ID as an external protocol handler and offer to launch this local application when given a matching URL on Windows operating systems. This should only happen if the program has specifically registered itself as a "URL Handler" in the Windows registry. *Note: This issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

    References: , https://www.mozilla.org/security/advisories/mfsa2019-07/, https://www.mozilla.org/security/advisories/mfsa2019-08/, https://www.mozilla.org/security/advisories/mfsa2019-11/, https://bugzilla.mozilla.org/show_bug.cgi?id=1527717

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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