[cabmandone]

The problem with most block foundations is they were never properly waterproofed before being back filled with dirt. Block is porous and will actually wick water. I could tell you about my battles with storm water over the last 4 or 5 years but it would probably scare the hell out of you. As others have said, get the water cleaned up and see if it dries or continues to weep afterward. If you don't get any rain and it continues to weep, I'd look into your waterline coming into the home. If this just showed up and the water was on to the home prior to you purchasing the home, I'd say it's groundwater infiltration.
Good luck and keep us posted.