Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, conduct clickjacking attacks, or execute arbitrary code.
ubuntu.com/security/CVE-2021-23953
ubuntu.com/security/CVE-2021-23954
ubuntu.com/security/CVE-2021-23955
ubuntu.com/security/CVE-2021-23956
ubuntu.com/security/CVE-2021-23958
ubuntu.com/security/CVE-2021-23960
ubuntu.com/security/CVE-2021-23961
ubuntu.com/security/CVE-2021-23962
ubuntu.com/security/CVE-2021-23963
ubuntu.com/security/CVE-2021-23964
ubuntu.com/security/CVE-2021-23965
ubuntu.com/security/notices/USN-4717-1