Of course they can, any team that makes it to a final has a chance of winning the trophy and if they were not strong enough, there's no way they could have progressed as far as the final. Chelsea fans will be watching the Liverpool v Fulham game today with interest, Liverpool hold a 2-1 advantage coming into this game, but this second leg is at the Craven Cottage, so it is going to be interesting and i think Fulham have a small chance. Chelsea would remember their recent defeats in cup finals against Liverpool, so they would either hope to meet them in the final for revenge or they might prefer a London derby final with Fulham.
I think Liverpool has a better chance of winning. They had won the first leg 2-1. So they only need a draw to advance to the Final. And Fulham they must be able to lead by at least 1 goal difference just to continue to extra time. And a 2 goal difference to advance to the Final. So they have a 50% higher chance. So let's talk about the Final match between Liverpool and Chelsea. With Chelsea's current form I think Liverpool will have a bigger chance of winning the Carabao cup. Unless Liverpool are unlucky on the night of the final. Because I think anyone will favor Liverpool more than Chelsea.
Liverpool team is in very good form. They have won their last 5 matches. Liverpool also dominated and won the home match against Fulham. However, the goal difference was not much. Even so, the match was dominated by Liverpool players.
Today's match is Fulham's home match. Still, I see no reason to think Fulham are favourites. This group is not very strong. They also lost against Chelsea in their last Premier League match. Also, if Liverpool draw today's match, they can qualify for the next round. So the possibility of Chelsea vs Liverpool final is more likely.
I also think that Liverpool are favourites in this match, but Fulham is still not the easiest opponent... It's the League Cup, and you can see that other teams from the EPL for some reason didn't make it to the semi-finals... Like Man City, Arsenal or even Spurs... So I think it's hard to predict the outcome of this battle...