Mozilla has published two security advisories (MFSA 2020-42 and MFSA 2020-43) to address multiple vulnerabilities in Firefox browser. A remote attacker could entice a user running a vulnerable browser to visit a web page with specially crafted content to exploit the vulnerabilities.
Successful exploitation of the vulnerabilities could lead to arbitrary code execution, cross site scripting, spoofing or application crash on an affected system.
Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:
Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/
https://www.hkcert.org/my_url/en/alert/20092302
https://us-cert.cisa.gov/ncas/current-activity/2020/09/22/mozilla-releases-security-updates-firefox-and-firefox-esr
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15673 (to CVE-2020-15678)