The training-registration page in Cisco WebEx Training Center allows remote attackers to modify unspecified fields via unknown vectors, aka Bug ID CSCul35990.
https://exchange.xforce.ibmcloud.com/vulnerabilities/89684
http://www.securityfocus.com/bid/64305
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6969