Summary: Under certain conditions, a workbook viewed on Tableau Server shows data from a published data source on another site.
Vulnerable Versions: Tableau Server 9.0 (through 9.0.2)
Resolution: The issue can be fixed by upgrading to the following Tableau Server versions:
Tableau Server 9.0.3
Knowledgebase Article: Security Advisory: Workbook Shows Data From Different Site | Tableau Software