source: https://www.securityfocus.com/bid/43577/info
MODx is prone to a local file-include vulnerability and a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.
An attacker can exploit the local file-include vulnerability using directory-traversal strings to view and execute local files within the context of the webserver process. Information harvested may aid in further attacks.
The attacker may leverage the cross-site scripting issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may let the attacker steal cookie-based authentication credentials and launch other attacks.
MODx 2.0.2-pl is vulnerable; other versions may also be affected.
http://www.example.com/modx/manager/controllers/default/resource/tvs.php?class_key=../../../../../../../../../../windows/win.ini%00
