Web services in Xerox WorkCentre and WorkCentre Pro before 12.060.17.000, 13.x before 13.060.17.000, and 14.x before 14.060.17.000 do not require HTTPS, which allows remote attackers to obtain sensitive information by sniffing the unencrypted HTTP traffic.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30679
http://www.xerox.com/downloads/usa/en/c/cert_XRX06_006_v1b.pdf
http://www.vupen.com/english/advisories/2006/4791