Version of Splunk DB Connect 3.13.0 is only supported for splunk 9.0 and older version 8.2 or 8.1 is there any solution what to use instead of Splunk DB Connect because with version 9.0 there are vulnerabilities ?
Splunk has only one product for fetching data from an SQL database and it's DB Connect.
You can, however, write your own modular input that reads from your database and writes the results to an index.