Please note: The TCAdminCrons plugin (https://community.tcadmin.com/files/file/59-tcadmincrons/) uses ServerJars to get updates. ServerJars has not compiled patched versions yet, and I'm not sure they are going to (at least for old versions).
If you provide patched versions, you will need to remove all affected versions from TCAdmin and run the TCAdminCrons plugin again. The plugin will not overwrite existing updates in TCAdmin.
Also, as far as I understand, this is not a security issue for your servers. It affects clients, not servers.
If I'm wrong, please tell me.