Detailed information about Telstra's customer accounts - including usernames and passwords - has been found to be sitting on the open web for anyone to access via a Google search.

A user of the Whirlpool forum discovered the "Telstra Bundles request search" page after doing a web search for a Telstra customer support phone number they were told to contact.

The tool people discovered available on the public web. Credit:Fairfax Media

Anyone who visits the page can search Telstra's customer database based on the customer's last name, account number, sales force ID or reference number.

They are then presented with detailed information outlining the customer's account number, what broadband plan they're on, what other Telstra services they're signed up to and notes associated with the customers' accounts including in many cases their usernames and passwords.