Apparently a mold issue. What does this mean?

[DAVID SCHREIBER]

Looking at a foreclosure.   One of the upstairs bedrooms had this sticker on the wall.

In the basement and the garage it appears that they sprayed white paint of some sort on all the surfaces.  Either to improve the appearance or to treat mold.

Any idea how we should evaluate this variable?  Have it tested?  Run away?  Poke a hole in the wall and see what we find?  Fix the presumably leaky roof and don't worry about it?

Thanks