CVE-2021-43533
Medium
Published: 08 December 2021
Published
08 December 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1
4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
EPSS Score
0.0019
40.2th percentile
Risk Priority
9
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-43533 is a medium-severity an unspecified weakness vulnerability in Mozilla Firefox. Its CVSS base score is 4.3 (Medium).
Operationally, ranked at the 40.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-30462
Vulnerability details
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mozilla
firefox
≤ 94.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.