So, if you have found out vulnerability on revi.xyz server?

That is not something I can work on. Contact Cloudflare. They run the infrastructure on Cloudflare Pages.

Otherwise, I use these software. It's likely that the problem you discovered is their problem, not mine.

After reading above, if you are still certain if you discovered a security bug that falls within MY responsibility, then contact me.

Use the contact details at security.txt.