CVE-2021-29975

Public Exploit

Description

Through a series of DOM manipulations, a message, over which the attacker had control of the text but not HTML or formatting, could be overlaid on top of another domain (with the new domain correctly shown in the address bar) resulting in possible user confusion. This vulnerability affects Firefox < 90.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.39%

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

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2021-28/	vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1713259	issue tracking exploit vendor advisory
https://security.gentoo.org/glsa/202202-03	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-29975?: CVE-2021-29975 has been scored as a medium severity vulnerability.
How to fix CVE-2021-29975?: To fix CVE-2021-29975, 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-2021-29975 being actively exploited in the wild?: It is possible that CVE-2021-29975 is being exploited or will be exploited in a near future based on public information. 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-2021-29975?: CVE-2021-29975 affects Mozilla Firefox.

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