> I've reported four 0-day vulnerabilities this year between March 10 and May 4, as of now three of them are still present in the latest iOS version (15.0) and one was fixed in 14.7
It would have been clearer if in each of the 4 vulnerabilities the timeline was given. The article only gives a timeline for the last vuln (the fixed one).
> I've reported four 0-day vulnerabilities this year between March 10 and May 4
So the vulnerabilities were reported at least 140 days ago. He also mentions 3 upgrades of iOS were published after his reports.
Even though I read the sentence at the beginning saying the author reported all 4 to Apple, when I saw there was a reporting timeline on 1 vuln but not the other 3 I started doubting my own memory and thought maybe the author only reported 1 vuln to Apple. I had to go back and re-read the first paragraph again to reassure myself that all 4 were reported to Apple.