CVE-2021-4221

Published Dec 22, 2022 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-34079 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.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.0073}

epss

{'score': 0.00783}

Type Values Removed Values Added
Weaknesses CWE-1007
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Apr 16, 2025, 3:49 PM
Reserved
Feb 18, 2022, 12:00 AM
Status
Modified
Published
Dec 22, 2022, 8:15 PM
Modified
Jun 17, 2026, 4:19 AM