If you wish to modify your perk levels, I've found all the pointer address scans. It's basic and pretty straight forward to use.
You can find it by searching: Killing Floor 2 Pre-Configured Perk Leveling via Cheat Engine
Changing the value to 6553614 should grant you level 25, though I suggest running as a level 16. If you run at level 25 and play poorly, people will know within 1 round that its not a legitimate level.