Re:Desk 2.3 contains a blind unauthenticated SQL injection vulnerability in the getBaseCriteria() function in the protected/models/Ticket.php file. By modifying the folder GET parameter, it is possible to execute arbitrary SQL statements via a crafted URL. Unauthenticated remote command execution is possible by using this SQL injection to update certain database values, which are then executed by a bizRule eval() function in the yii/framework/web/auth/CAuthManager.php file. Resultant authorization bypass is also possible, by recovering or modifying password hashes and password reset tokens, allowing for administrative privileges to be obtained.

Re:Desk 2.3 allows insecure file upload.

Re:Desk 2.3 has a blind authenticated SQL injection vulnerability in the SettingsController class, in the actionEmailTemplates() method. A malicious actor with access to an administrative account could abuse this vulnerability to recover sensitive data from the application's database, allowing for authorization bypass and taking over additional accounts by means of modifying password-reset tokens stored in the database. Remote command execution is also possible by leveraging this to abuse the Yii framework's bizRule functionality, allowing for arbitrary PHP code to be executed by the application. Remote command execution is also possible by using this together with a separate insecure file upload vulnerability (CVE-2020-15488).