Mozilla Releases Security Updates for Thunderbird, Firefox, and Firefox ESR

Threat ID:: CC-3900
Threat Severity:: Information only
Published:: 14 July 2021 11:03 AM

Report a cyber attack: call 0300 303 5222 or email [email protected]

Affected platforms

The following platforms are known to be affected:

Versions: all prior to 78.12

Mozilla Thunderbird

Versions: all prior to 90

Mozilla Firefox

Versions: all prior to 78.12

Mozilla Firefox ESR

Threat details

Introduction

Mozilla has released security updates to address vulnerabilities in Thunderbird, Firefox, and Firefox ESR. An attacker could exploit these vulnerabilities to take control of an affected system.

Remediation advice

Affected organisations are encouraged to review the Mozilla Security Advisories and apply the necessary updates.

Remediation steps

Type	Step
Guidance	Security Vulnerabilities fixed in Thunderbird 78.12 https://www.mozilla.org/en-US/security/advisories/mfsa2021-30/
Guidance	Security Vulnerabilities fixed in Firefox 90 https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/
Guidance	Security Vulnerabilities fixed in Firefox ESR 78.12 https://www.mozilla.org/en-US/security/advisories/mfsa2021-29