Oil in spark plug chamber

I have a 2004 Impreza GX 2.0 MT (176071) and I was about to replace spark plugs when I noticed the chamber was wet with oil

I bought the car about a week ago and it came with an oil change, but the dipstick shows it may of been overfilled.

P.S - I’ve noticed no idle problems, smoke, accel problems etc, just oil on the spark plug chamber

What is the problem and should I drive the car in the meantime?