Well it is too late to reprocess them and they are well under-processed and it is too late to freeze them now too.

About all you could do is mark them as underprocessed and make sure they get cooked really well after opening if you are comfortable with that risk.

But that is too much risk for me to be comfortable with so all I can do is tell you what I would do with the disclaimer that this is NOT approved methodology by any means. And I would only do this if I had enough jars to make it worth while trying to save them. For a few jars I'd just toss them and call it a lesson well-learned the hard way.

I'd open all jars, dump all back into the pot, bring back to a full boil adding juice or water as needed and re-do them from scratch - clean jars, new lids, additional lemon juice or citric acid - with full processing and marked as double processed for cooking only.

JMO

Dave

At this point there is no way to be sure if reprocessed all bacteria would be destroyed.
Sorry, I would toss them, personally.