Describe CVE-2017-6391.
What is CVE-2017-6391?
An issue was discovered in Kaltura server Lynx-12.11.0. The vulnerability exists due to insufficient filtration of user-supplied data passed to the "admin_console/web/tools/SimpleJWPlayer.php" URL, the "admin_console/web/tools/AkamaiBroadcaster.php" URL, the "admin_console/web/tools/bigRedButton.php" URL, and the "admin_console/web/tools/bigRedButtonPtsPoc.php" URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website..