Medium severity4.3NVD Advisory· Published Dec 22, 2022· Updated Jun 17, 2026
CVE-2021-4221
CVE-2021-4221
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. *This bug only affects Firefox for Android. Other operating systems are unaffected.**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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <92.0
- (no CPE)range: unspecified
- Range: <92
Patches
Vulnerability mechanics
References
2- bugzilla.mozilla.org/show_bug.cginvdExploitIssue TrackingVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-38/nvdVendor Advisory
News mentions
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