interface/fax/fax_dispatch.php in OpenEMR 4.1.0 allows remote authenticated users to execute arbitrary commands via shell metacharacters in the file parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/72915
http://www.open-emr.org/wiki/index.php/OpenEMR_Patches
http://secunia.com/advisories/47781
http://archives.neohapsis.com/archives/bugtraq/2012-02/0004.html