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Mozilla has released security updates to address
vulnerabilities in Firefox, Firefox ESR, and Thunderbird. An attacker could
exploit some of these vulnerabilities to take control of an affected system.
CERT Bulgaria encourages users and administrators to review the Mozilla
security advisories for Firefox
94, Firefox
ESR 91.3, and Thunderbird
91.3.
https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/
https://www.mozilla.org/en-US/security/advisories/mfsa2021-49/
https://www.mozilla.org/en-US/security/advisories/mfsa2021-50/