OpenEMR before 5.0.2 is vulnerable to local file inclusion via the fileName parameter in custom/ajax_download.php. An attacker can download any file (that is readable by the web server user) from server storage. If the requested file is writable for the web server user and the directory /var/www/openemr/sites/default/documents/cqm_qrda/ exists, the file will be deleted from server.
View the template here CVE-2019-14530.yaml
References:
https://github.com/sec-it/exploit-CVE-2019-14530