Vulnerability is Same Origin Policy (SOP) bypass issue that resides in Samsung Internet Browser version 5.4.02.3 and earlier. The vulnerability is a security feature applied in modern browsers that is designed to make it possible for web pages from the same website to interact while preventing unrelated sites from interfering with each other. Attackers can steal data, such as passwords or cookies, from the sites opened by the victim in different tabs. Samsung has acknowledged the vulnerability and released an exploit for Metasploit.
Source: https://thehackernews.com/2017/12/same-origin-policy-bypass.html