WordPress <= 6.1.1 – Unauth. Blind SSRF vulnerability

Hello @everyone,

I have this message alert on my Ikoula hoster (Plesk) :
WordPress <= 6.1.1 – Unauth. Blind SSRF vulnerability

And the install of WordPress can not be upgrade to PHP 8,
without error message on my website :

There has been a critical error on this website

Could you help me with that ?

The page I need help with: [log in to see the link]