Medium severity4.3NVD Advisory· Published Dec 8, 2021· Updated Jun 17, 2026
CVE-2021-43533
CVE-2021-43533
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<94+ 1 more
- (no CPE)range: <94
- (no CPE)range: unspecified
Patches
Vulnerability mechanics
References
2- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- www.mozilla.org/security/advisories/mfsa2021-48/nvdVendor Advisory
News mentions
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