Cross-site scripting (XSS) vulnerability in JBMC Software DirectAdmin before 1.293 does not properly display log files, which allows remote authenticated users to inject arbitrary web script or HTML via (1) http or (2) ftp requests logged in /var/log/directadmin/security.log; (3) allows context-dependent attackers to inject arbitrary web script or HTML into /var/log/messages via a PHP script that invokes /usr/bin/logger; (4) allows local users to inject arbitrary web script or HTML into /var/log/messages by invoking /usr/bin/logger at the command line; and allows remote attackers to inject arbitrary web script or HTML via remote requests logged in the (5) /var/log/exim/rejectlog, (6) /var/log/exim/mainlog, (7) /var/log/proftpd/auth.log, (8) /var/log/httpd/error_log, (9) /var/log/httpd/access_log, (10) /var/log/directadmin/error.log, and (11) /var/log/directadmin/security.log files.