>Does that mean I can make a post like this?

No. Just because there's a blog post about a fixed vulnerability doesn't imply that it's ok to write a blog post about an unfixed vulnerability.

I'm not saying it's wrong to post a blog post about an unfixed vulnerability. I'm just saying that the existence of a blog post about a fixed vulnerability has no impact on whether it's ok or not to post a blog post about an unfixed vulnerability.