You need to search for them in IPB 2.3.3. I didn’t look at this version yet, but you could try to look by yourself . Remember, who looks that will find.

Man, in December I found XSS hole in Invision Power Board - in both 1.x and 2.x versions (and potentially 2.3.3 is also vulnerable). I’m planning to disclose it in the future.

I need to find a vulnerability in IPB version 2.3.3,

any ideas?