Malicious website pop up on safari from a legitimate website after mistakenly clicking an ad.

Try double clicking the Home button or swipe up from the bottom of the screen and swipe Safari upwards. Go to Settings/Safari and clear History and Website Data. Open Safari and test.

Safari - Clear the history and cookies on your iPhone, iPad, or iPod touch

Safari website data on your iPhone or iPad - How to clear

If slightly hindered safari experience is not an issue, turn on "block all cookies" on Safari settings. It worked for me (so far).

You can test the free version of the below app to see if it helps.

Malwarebytes for IOS

See if anything here helps.

Safari - Stop pop-up ads in 

Safari popups that won't go away    IOS

I’m experiencing this problem too.

I cleared all my data, cleared browsing history, cleared Facebook browsing history.

I noticed an increase of this pop up when I am on health links but it pops up at other websites as well.

I can’t get it to stop!

[Link Edited by Moderator]

I have the same problem. I cleared history, cache and data of safari and clear browser history in Facebook too. Still have this pop up when visiting certain website I know they are legit since I always visited them in the past.

what to do?

I too have it. Deleted all cookies, wiped out Facebook, deleted all apps that I think might have contributed to it. I also have Norton Mobile Security and am running a VPN, all it does it warn me not to click on it on the pop up when it appears. I can’t get rid of this pop up. It seems to hijack my webpages randomly, it don’t even have to be on healthline, although, that’s where I think I may have picked it up. Apple needs to come up with a security fix to this.

I can’t figure out how it keeps finding me. But it’s fricken annoying.

I am having the same issue, was on mayoclinic and healthline trying to help my sick girlfriend and can't access the information on the page in a time of need, what a **** off. Have never had this happen on an iPhone...

today I’ve gotten it both from healthline and sparknotes and it’s really upsetting me.