iPhone isn't safe on old iOS anymore, update to at least iOS 15 now

All iPhone users running iOS 13 or iOS 14 need to update now. Apple has confirmed routine browsing can trigger attacks on outdated iOS versions.
Forbes

New Apple Attack Warning—If You Own An Older iPhone, Update It Now

Forbes contributors publish independent expert analyses and insights. Kate O’Flaherty is a cybersecurity and privacy journalist. Apple has issued a warning for users of older iPhones to update now.

Apple Releases Security Updates for iOS/iPadOS 15 and 16

Apple released new security updates yesterday for iOS/iPad OS 15 and 16 to address the Coruna exploit targeting older ...

Latest iOS 15 & iOS 16 updates target Coruna exploit affecting older devices

Apple has virtually eliminated the remaining addressable iPhones being targeted by the Coruna exploit being traded around the black market — that is, if you update your iPhone.