PS4: How to get your hands on a PS4 with a 4.55 firmware or lower - Wololo.net
According to theflow0 disclosure for BD-JB exploit, here is some table chart which exploit is working and which exploit is not working for each console PS4 and PS5 with their respective firmware :
PS4 System Software Update 4.5 - 12 Things You Need To Know - YouTube
PS4 4.50 update delivers 'Boost mode' on PS4 Pro, adds external drive support | Extremetech
New PS4 Webkit Exploit impacts Firmware 9.03 to 10.01 | Tested on 9.00 - YouTube