IBM watsonx.data intelligence 5.2.0, 5.2.1, 5.3.0, 5.3.1 stores user credentials in plain text which can be read by a local user.
Update version to 5.3.1-patch3
https://www.ibm.com/docs/en/software-hub/5.3.x?topic=overview-available-patches-software-hub-version-531