Hi. this is a young female triangulate cobweb spider. Steatoda triangulosa species.
They are not medically significant. Pretty much just another house spider.
Species Steatoda triangulosa – BugGuide.Net
Not S. triangulosa. I’m not even convinced that’s a Theridiid.
This does look like a very young juvenile making it hard to ID.
It may even turn out to be Araneidae. The only other I can think of as possible.
I tried to bring out the eyes and claws best I could, but still uncertain.
Due to the features and environment its on, Im fairly sure this is a False Widow. Steatoda Genus
The eyes don’t really fit though. I have no idea what it is. It’s really small going by the screw mark in the picture so it could be an immature orb weaver or something else entirely.