CVE-2021-38492

    Dashboard / Vulnerabilities / CVE-2021-38492

    CVE-2021-38492

    Published: 3 Nov 2021Last Modified: 10 Mar 2026

    Summary:

    Details: When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

    References: , https://www.mozilla.org/security/advisories/mfsa2021-40/, https://www.mozilla.org/security/advisories/mfsa2021-41/, https://www.mozilla.org/security/advisories/mfsa2021-42/, https://security.gentoo.org/glsa/202208-14, https://www.mozilla.org/security/advisories/mfsa2021-38/, https://www.mozilla.org/security/advisories/mfsa2021-39/, https://bugzilla.mozilla.org/show_bug.cgi?id=1721107

    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
    CVE-2021-38492 | CVE-DB