Cross Site Scripting (XSS) vulneraibility in Roundcube mail .4.4 via database host and user in /installer/test.php.
https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
https://lorexxar.cn/2020/06/10/roundcube-mail-xss/#Store-Xss-in-installer-test-php