I'm not an expert on wormholes, but: general relativity will tell you how space curves for any ol' distribution of mass you like, and it tells you there ain't no distribution of mass you can arrange that'll give you a wormhole.
On the other hand, we still don't understand the whole relativity/quantum-mechanics overlap region, so it's possible that whatever new physics are waiting for us in that regime just might include wormholes.
I'm really reluctant to say that, though. Many people seem to jump straight from that to drawing pictures of wormhole-hopping spaceships. Sorry, it's very very very very very very very unlikely to happen.
I didn't know that you couldn't arrange mass in any way to get a wormhole.
I've never been able to figure out in my (broken, I'm sure) mental model how you could create a wormhole but I suspected that the people who actually understood physics did know.
On the other hand, we still don't understand the whole relativity/quantum-mechanics overlap region, so it's possible that whatever new physics are waiting for us in that regime just might include wormholes.
I'm really reluctant to say that, though. Many people seem to jump straight from that to drawing pictures of wormhole-hopping spaceships. Sorry, it's very very very very very very very unlikely to happen.