Some 90 percent of iOS mobile applications have at least one security vulnerability, according to HP research quoted by ZDNet. The company`s enterprise security team, HP Fortify, tested 2,107 mobile apps from the Forbes Global 2000, published by more than 600 developers. 71 percent of the vulnerabilities found were actually problems on the server end of the app, usually common vulnerabilities such as SQL injection and cross-site scripting bugs. 3 in 4 apps didn`t encrypt personal data, including passwords, before storing it on the device.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/most-ios-apps-are-vulnerable-to-hackers-study-shows/