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NVD Vulnerability Details :
CVE-2021-4221
Modified
More InfoOfficial Page
Source-security@mozilla.org
View Known Exploited Vulnerability (KEV) details
Published At-22 Dec, 2022 | 20:15
Updated At-16 Apr, 2025 | 16:15

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Secondary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Type: Primary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CPE Matches
Mozilla Corporation
mozilla
>>firefox>>Versions before 92.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Google LLC
google
>>android>>-
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-OtherPrimarynvd@nist.gov
CWE-1007Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: NVD-CWE-Other
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-1007
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=1704422security@mozilla.org
Exploit
Issue Tracking
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-38/security@mozilla.org
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1704422af854a3a-2127-422b-91ae-364da2661108
Exploit
Issue Tracking
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-38/af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1704422
Source: security@mozilla.org
Resource:
Exploit
Issue Tracking
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-38/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1704422
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Exploit
Issue Tracking
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-38/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Vendor Advisory
Change History
0Changes found
Details not found