USN-4756-1

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    USN-4756-1

    Published: 26 Feb 2021Last Modified: 22 Apr 2026

    Summary: firefox vulnerabilities

    Details: Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, conduct cross-site scripting (XSS) attacks, bypass HTTP auth phishing warnings, or execute arbitrary code.

    References: https://ubuntu.com/security/notices/USN-4756-1, https://ubuntu.com/security/CVE-2021-23968, https://ubuntu.com/security/CVE-2021-23969, https://ubuntu.com/security/CVE-2021-23970, https://ubuntu.com/security/CVE-2021-23971, https://ubuntu.com/security/CVE-2021-23972, https://ubuntu.com/security/CVE-2021-23973, https://ubuntu.com/security/CVE-2021-23974, https://ubuntu.com/security/CVE-2021-23975, https://ubuntu.com/security/CVE-2021-23978, https://ubuntu.com/security/CVE-2021-23979

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build3-0ubuntu0.16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -86.0+build3-0ubuntu0.16.04.1

    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
    USN-4756-1 | CVE-DB