Unrestricted file upload in GLPI before 0.85.3 allows remote authenticated users to execute arbitrary code by adding a file with an executable extension as an attachment to a new ticket, then accessing it via a direct request to the file in files/_tmp/.
https://forge.glpi-project.org/issues/5217
http://www.glpi-project.org/spip.php?page=annonce&id_breve=338