Complex sentence: The hidden page may be an authentic page, and therefore the attackers can trick users into performing actions which the users never intended to do and there is no way of tracing such actions later, as the user was genuinely authenticated on the other page.
Split into simpler sentences: The hidden page may be an authentic page, and therefore the attackers can trick users into performing actions which the users never intended. There is no way of tracing such actions later, as the user was genuinely authenticated on the other page.