CVE-2020-12390

Description

Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.47% Top 25%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2020-16/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1141959 permissions required

Frequently Asked Questions

What is the severity of CVE-2020-12390?
CVE-2020-12390 has been scored as a critical severity vulnerability.
How to fix CVE-2020-12390?
To fix CVE-2020-12390, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12390 being actively exploited in the wild?
It is possible that CVE-2020-12390 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-12390?
CVE-2020-12390 affects Mozilla Firefox.
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