Old Hot point (12-14 years) leaking

[Mommahome]

My fridge has been leaking inside from (what it looks like, anyway) the temp control panel in back (maybe the freezer above) and pooling at the bottom under the crisper drawers. Now it is leaking from somewhere outside and pooling all over my kitchen floor. It is coming from either under or behind it (haven't moved it out yet). Any ideas what it might be? Trying to figure out if it is worth trying to fix myself.

Model CTX21GAXJRWW

[Mommahome]

Ok, isolated the outside leak. The ice maker filter cartridge (outside mount) had a pinhole leak. Now I just need help figuring out the inside leak.  Thanks.

[MajorApp]

 Remove the back panel from inside the freezer and check for a clogged or frozen drain hole. If the drain hole is clogged or frozen the defrost water will drip into the refrigerator

[Repair-man]

My guess is the cold water tank behind the crispers.