The host is installed with Safari before 13.1.2 on Apple Mac OS X 10.13.6, 10.14.6 or 10.15.x before 10.15.6 or Apple Mac OS 11 before 11.0.1 and is prone to an address bar spoofing vulnerability. A flaw is present in the application, which fails to properly handle an inconsistent user interface issue. Successful exploitation may allow an attacker to perform spoofing attacks.