A simple trick gives anyone full access to your cellphone private information in Mail, SMS, Contacts, and even Safari. The two-step trick is even simpler to the one used in the past to gain access to the phone to install unlocking cards or jailbreak. The security problem here is double: anyone picking up your phone can make a call to anyone in your favorites. On top of that, this also opens access to. your full Address Book, the dial keypad, and your voice mail.”]
Source: https://gizmodo.com/huge-iphone-security-flaw-puts-all-private-information-5042332