CVE-2021-43533 Other in Firefox
Firefox fails to properly parse internationalized domain names, allowing attackers to create confusing URLs for phishing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-43533?
CVE-2021-43533 is a medium-severity vulnerability in Mozilla Firefox, published on 8 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2021-43533?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2021-43533?
Upgrade to a fixed version.
Is CVE-2021-43533 being exploited?
There is no known exploitation of CVE-2021-43533 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-v2fg-9ph4-5293.