Laravel 5.4.x before 5.4.22 does not properly constrain the host portion of a password-reset URL, which makes it easier for remote attackers to conduct phishing attacks by specifying an attacker-controlled host.
www.securityfocus.com/bid/98776
github.com/FriendsOfPHP/security-advisories/blob/master/illuminate/auth/CVE-2017-9303.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/laravel/framework/CVE-2017-9303.yaml
github.com/laravel/framework/commit/cef10551820530632a86fa6f1306fee95c5cac43
laravel-news.com/laravel-5-4-22-is-now-released-and-includes-a-security-fix
laravel.com/docs/5.4/releases#laravel-5.4.22
nvd.nist.gov/vuln/detail/CVE-2017-9303
web.archive.org/web/20171021180417/www.securityfocus.com/bid/98776