Possible water leak damaging hardwood

[DannyDan]

Hello,

I've recently noticed what seems to be some changes to the hardwood flooring surrounding my dishwasher and kitchen sink. There is some discoloration and the hardwood seems to have expanded a bit, as can be observed by some pieces not being leveled. I looked under the sink and under the dishwasher and could not observe any leak or moisture. I was wondering if anyone here that is experienced with water leaks could take a look at the photos and tell me if my suspicion seems correct. If it is, what are some possible causes? Could there be a pipe underneath the hardwood that's leaking? Or could it be the dishwasher?
Images here:

Thanks in advance!

 

[Fitter30]

Two screws usually hold the kick plate on a dishwasher. Pull it and look with a flashlite.

 

[Sponsor]

 

[Breplum]

You just have to be observant, and certainly look at it from under the floor just to eliminate, after looking in the toe space of the DW.
In reality, it would be extremely rare to have a pipe under the floor causing observable damage.
So, if not under the floor, then somewhere having to do with the dishwasher.