Comment on SharePoint security fixes released with December 2019 PU and offered through Microsoft Update by Stefan Goßner

Hi Henry,
that is NOT correct. You need to apply the language independent fix from November CU for this specific issue:
https://support.microsoft.com/help/4484143
You can see this info in the in the CVE article:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1491
Thanks,
Stefan