Rot under sink?

Previous tenant in my new place must have had a leak under the sink, the wood has expanded and there is yellowing on the white laminate. There is also an odor, it's not too bad but it builds up when we keep the cabinet doors closed overnight which is why I open it to air it out. Sometimes I can smell the odor on the pots and other kitchen items I keep down there. 

I have tried spraying it with lysol and a weak concentration of bleach but the smell persists. I will try again to see if a strong concentration will work but if it doesn't what are my options. I did not notice it when checking the place and landlord is too cheap to do anything about it.