source: http://www.securityfocus.com/bid/27066/info
 
PHCDownload is prone to an SQL-injection and cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.
 
An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks. Attackers may also exploit this issue to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.
 
PHCDownload 1.1.0 is vulnerable; other versions may also be affected. 

http://www.example.com/[phcdownload/search.php?string=[XSS]