it is possible to know bugs reported by other researchers title, affected parameter and url in simple a simple bug.
Researcher uses a shared computer.
Researcher submits a report.
Researcher logs out.
Another person logs in, on another account.
Another person submits a report.
When entering a title, the title of the previous report submitted by the researcher is shown in autocompletion box.
This gives away the title, report url & affected parameter of the bug to other users of the web browser, even though the researcher logged out properly.
Simple, put autocomplete="off" for <input type parameters.