Attach a CSV file to the newly created Confluence page (let’s assume the file name is test.csv).
Edit the page
Include “Table from CSV URL“ user macro into the page
Click the macro container and select “Edit” (Edit macro dialog will appear)
In the Edit macro set the CSV URL parameter as follows: “:^test.csv” (without quotes). Note, that the format of this fields allows referring to attachments of not only the current page, but any other pages in your Confluence instance (full format is <space>:<page title>^<attachment>#<version>. By default the current version of the attachment will be used, however, you can instruct to use the specific version of the attachment. For example, if you need version 7 of the file, append #7 to the CSV URL.