The autoupdate implementation in TimeDoctor Pro 1.4.72.3 on Windows relies on unsigned installer files that are retrieved without use of SSL, which makes it easier for man-in-the-middle attackers to execute arbitrary code via a crafted file.
Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.