The Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the CTI server on port 8888. A remote unauthenticated attacker can invoke the challenge action with a crafted username and discover user passwords.
ucm6204_firmware
CVE-2019-10662
Grandstream UCM6204 before 1.0.19.20 devices allow remote authenticated users to execute arbitrary code via shell metacharacters in the backupUCMConfig file-backup parameter to the /cgi? URI.
CVE-2019-10663
Grandstream UCM6204 before 1.0.19.20 devices allow remote authenticated users to conduct SQL injection attacks via the sord parameter in a listCodeblueGroup API call to the /cgi? URI.