jeecgboot JimuReport Data Large Screen Template testConnection deserialization

A vulnerability was determined in jeecgboot JimuReport up to 2.1.1. Affected by this issue is some unknown functionality of the file /drag/onlDragDataSource/testConnection of the component Data Large Screen Template. The manipulation leads to deserialization. The attack may be launched remotely. The vendor response to the GitHub issue report is: "Modified, next version updated".