CVE-2021-23972

Description

One phishing tactic on the web is to provide a link with HTTP Auth. For example 'https://www.phishingtarget.com@evil.com'. To mitigate this type of attack, Firefox will display a warning dialog; however, this warning dialog would not have been displayed if evil.com used a redirect that was cached by the browser. This vulnerability affects Firefox < 86.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.38%

Vendor Advisory gentoo.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2021-07/	vendor advisory release notes
https://bugzilla.mozilla.org/show_bug.cgi?id=1683536	vendor advisory permissions required issue tracking
https://security.gentoo.org/glsa/202104-10	vendor advisory third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-23972?: CVE-2021-23972 has been scored as a high severity vulnerability.
How to fix CVE-2021-23972?: To fix CVE-2021-23972, 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-2021-23972 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-23972 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23972?: CVE-2021-23972 affects Mozilla Firefox.

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