MFSA2021-11: Security Vulnerabilities fixed in Firefox ESR 78.9

Reference Links

• https://www.mozilla.org/en-US/security/advisories/mfsa2021-11/ (Advisory)

Child vulnerabilities

(Contains the following vulnerabilities)

• CVE-2021-29955
• CVE-2021-23981
• CVE-2021-4127
• CVE-2021-23982
• CVE-2021-23984
• CVE-2021-23987

Frequently Asked Questions

• What is the severity of MFSA2021-11?

  The severity of MFSA2021-11 has been categorized as critical due to the potential risk of exploitation.

• How do I fix MFSA2021-11?

  To fix MFSA2021-11, update Firefox ESR to version 78.9 or a newer version.

• What vulnerabilities are addressed in MFSA2021-11?

  MFSA2021-11 addresses multiple security vulnerabilities impacting Firefox ESR prior to version 78.9.

• Is it safe to use Firefox ESR version 78.9 after MFSA2021-11?

  Yes, using Firefox ESR version 78.9 is considered safe as it contains fixes for the vulnerabilities outlined in MFSA2021-11.

• What should I do if I cannot update to Firefox ESR version 78.9 for MFSA2021-11?

  If you cannot update to Firefox ESR version 78.9, it is recommended to switch to a supported version or find alternative browsers until an update can be applied.