Drywall / filler on the inside of the exterior wall

[Nanet]

I have an apartment on the 3rd floor. The exterior wall is made of brick with plaster on both sides. Since the walls were uneven, I chose to skim coat the entire walls in one room, which I got tired of.

So in the next room, I have started to glue drywall onto the walls. When I got to the exterior wall, I realized that maybe I need a vapor barrier? Is there any risk with my skim-coated interior of the exterior wall?

Thanks in advance!

 

[Nimajneb]

On the 3rd floor, it usually works great with filler and plaster on cement render, so keep going.

 

[Nanet]

I thought so, but it's always nice to have it confirmed!