CVE-2021-23961

Description

Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.

7.4

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.55%

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

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2021-03/	release notes vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1677940	vendor advisory issue tracking permissions required
https://www.debian.org/security/2021/dsa-4895	third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00019.html	third party advisory mailing list
https://www.debian.org/security/2021/dsa-4897	third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00020.html	third party advisory mailing list
https://security.gentoo.org/glsa/202104-10	third party advisory vendor advisory
https://security.gentoo.org/glsa/202104-09	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-23961?: CVE-2021-23961 has been scored as a high severity vulnerability.
How to fix CVE-2021-23961?: To fix CVE-2021-23961, 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-2021-23961 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-23961 is being actively exploited. 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-2021-23961?: CVE-2021-23961 affects Mozilla Firefox.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.