Cross-site scripting (XSS) vulnerability in phpESP 1.7.5 and earlier allows remote attackers to inject arbitrary web script or HTML via unknown vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22904
http://www.vupen.com/english/advisories/2005/2237
http://www.securityfocus.com/bid/15232
http://secunia.com/advisories/17333
http://cvs.sourceforge.net/viewcvs.py/phpesp/phpESP/docs/CHANGES?rev=.&content-type=text/plain