CVE-2021-43533

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    CVE-2021-43533

    Published: 8 Dec 2021Last Modified: 10 Mar 2026

    Summary:

    Details: When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94.

    References: , https://www.mozilla.org/security/advisories/mfsa2021-48/, https://bugzilla.mozilla.org/show_bug.cgi?id=1724233

    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-2021-43533 | CVE-DB