Patching is the fix. This is what to do until you can.
Getting Through the PHP2Shell Gap
What I did between PHP's 'critical fix coming' warning and the actual release, from upload blocks at Cloudflare and nginx to building patched PHP myself.
BLOG: #nginx
#nginx
Just in case
NGiNX: Using Vercel as Fallback for Reverse Proxy
How to configure NGiNX to use Vercel as a fallback when the primary host is down for your reverse proxy
117
You gotta pay the toll
WordPress: An Adventure in Paywalls
If you're running a highly-cached, high-traffic WordPress site and need a paywall, things can get a little weird. I try and make things a little less weird, but it's possible I made them even weirder.
206
Wildcard host resolution for Windows/macOS
Using an Automatic Proxy Configuration script
7