Mozilla Security Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2019-35/
https://www.thunderbird.net/en-US/thunderbird/68.2.0/releasenotes/
CERT Nazionale Italia
https://www.certnazionale.it/news/2019/10/25/risolte-vulnerabilita-critiche-in-mozilla-thunderbird-68-2/