Man in the middle attacks (MiTM) are a popular method for hackers to get between a sender and a receiver. MiTM attacks are a form of session hijacking that are not new, but mobile devices are vulnerable to these types of attacks too. The exact same vulnerabilities that lead to these attacks on traditional devices apply to mobile devices. The cause is generally associated with incorrect certificate validation and leveraging protocols that aren’t secure such as SSL and early versions of SSL. Certificate pinning is needed to thwart such attacks.”]
Source: https://www.csoonline.com/article/3126363/man-in-the-middle-attacks-on-mobile-apps.html