Cross-site scripting (XSS) vulnerability in actions.php in Positive Software H-Sphere WebShell 4.3.10 allows remote attackers to inject arbitrary web script or HTML via (1) the fn parameter during a dload action, (2) the mask parameter during a search action, and (3) the tab parameter during a sysinfo action.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45613
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-4428
http://www.securityfocus.com/bid/31524
http://secunia.com/advisories/32086
http://packetstormsecurity.org/0810-exploits/webshell431-xssxsrf.txt