Multiple cross-site scripting (XSS) vulnerabilities in banners.cgi in PerlCoders BannerFarm 2.3 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) aff and (2) cat parameters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25919
http://www.vupen.com/english/advisories/2006/1410
http://secunia.com/advisories/19718
http://pridels0.blogspot.com/2006/04/bannerfarm-xss-vuln.html