UBUNTU-CVE-2021-23996

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    UBUNTU-CVE-2021-23996

    Published: 19 Apr 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-23996
    Aliases:
    USN-4926-1

    Summary:

    Details: By utilizing 3D CSS in conjunction with Javascript, content could have been rendered outside the webpage's viewport, resulting in a spoofing attack that could have been used for phishing or other attacks on a user. This vulnerability affects Firefox < 88.

    References: https://ubuntu.com/security/CVE-2021-23996, https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23996, https://ubuntu.com/security/notices/USN-4926-1, https://www.cve.org/CVERecord?id=CVE-2021-23996

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build2-0ubuntu0.16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -88.0+build2-0ubuntu0.16.04.1

    Affected versions

    41.0.2+build2-0ubuntu1

    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
    UBUNTU-CVE-2021-23996 | CVE-DB