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.

Cross-site request forgery (CSRF) vulnerability in actions.php in Positive Software H-Sphere WebShell 4.3.10 allows remote attackers to perform unauthorized actions as an administrator, including file deletion and creation, via a link or IMG tag to the (1) overkill, (2) futils, or (3) edit actions.