Open Dental before version 18.4 transmits the entire user database over the network when a remote unauthenticated user accesses the command prompt. This allows the attacker to gain access to usernames, password hashes, privilege levels, and more.
Open Dental before version 18.4 installs a mysql database and uses the default credentials of "root" with a blank password. This allows anyone on the network with access to the server to access all database information.
Open Dental 16.1 and earlier has a hardcoded MySQL root password, which allows remote attackers to obtain administrative access by leveraging access to intranet TCP port 3306. NOTE: the vendor disputes this issue, stating that the "vulnerability note ... is factually false ... there is indeed a default blank password, but it can be changed ... We recommend that users change it, each customer receives direction.