Mold growing behind the cabinet and no access to clean

[Sai T.]

mold is growing and I accidentally found the mold. It’s in corner of the floor cabinet and there is no access for clean up and I don’t know why it’s growing but I see the sewer pipe coming down but upstairs there is no bathroom. There is a bathtub upstairs but not above the kitchen.

Only to remove is remove the cabinets. Any idea and suggestions?

Thank you 🙏