mold behind drywall near plumbing 6

https://acornmetric.com/s/aX6w9f7ZQx6XiOxHui4Cp

After noticing a musty smell in the bathroom for weeks, I finally cut open a section of drywall near the plumbing, and sure enough, there was black mold thriving in the damp insulation behind it, the leaky pipe joint clearly the culprit.