A thunderbird security update has been released for Debian GNU/Linux 8 LTS.

DLA 2206-1: thunderbird security update

Package : thunderbird
Version : 1:68.8.0-1~deb8u1
CVE ID : CVE-2020-6831 CVE-2020-12387 CVE-2020-12392 CVE-2020-12395
CVE-2020-12397

Multiple security issues have been found in Thunderbird which could
result in spoofing the displayed sender email address, denial of service
or potentially the execution of arbitrary code.

For Debian 8 "Jessie", these problems have been fixed in version
1:68.8.0-1~deb8u1.

We recommend that you upgrade your thunderbird packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS