Verified answer

There is no way we can tell from just this information. Take it to a service garage and have it looked at. Just remember - the van is 13 years old and it's going to start falling apart.

"is this a bad thing"

Yup.

"why is it leaking"

Why is the sky blue? c'mon you know why things leak, they have a hole!

"can it be repaired"

Yup.

"the van is still running"

For now.