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    CVE-2021-4221

    If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. <br>*This bug only affects Firefox for Android. Other operating systems are unaffected.*<br>*Note*: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This vulnerability affects Firefox < 92.

    Published:Dec 22, 2022
    Last Modified:Apr 16, 2025
    EPS:Dec 22, 2022
    EPSS Score:0.00644
    CVSS Score:4.3

    Affected Products

    Vendor
    Google
    Product
    Android
    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    https://bugzilla.mozilla.org/show_bug.cgi?id=1704422https://bugzilla.mozilla.org/show_bug.cgi?id=1704422

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-632 Homograph Attack via Homoglyphs

    Related CVEs

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    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