A vulnerability in web interface of the Cisco Webex Event Center, Cisco Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training Center could allow an unauthenticated, remote attacker to guess account usernames. The vulnerability is due to missing CAPTCHA protection in certain URLs. An attacker could exploit this vulnerability by sending a crafted request to the web interface. A successful exploit could allow the attacker to know if a given username is valid and find the real name of the user.

A vulnerability in Cisco WebEx browser extensions for Google Chrome and Mozilla Firefox could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server, Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center), and Cisco WebEx Meetings when they are running on Microsoft Windows. The vulnerability is due to a design defect in the extension. An attacker who can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser. The following versions of the Cisco WebEx browser extensions are affected: Versions prior to 1.0.12 of the Cisco WebEx extension on Google Chrome, Versions prior to 1.0.12 of the Cisco…

meetinginfo.do in Cisco WebEx Event Center, WebEx Meeting Center, WebEx Sales Center, WebEx Training Center, WebEx Meetings Server 1.5(.1.131) and earlier, and WebEx Business Suite (WBS) 27 before 27.32.31.16, 28 before 28.12.13.18, and 29 before 29.5.1.12 allows remote attackers to obtain sensitive meeting information by leveraging knowledge of a meeting identifier, aka Bug IDs CSCuo68624 and CSCue46738.

Open redirect vulnerability in Cisco WebEx Training Center allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors, aka Bug ID CSCul36031.

Cross-site request forgery (CSRF) vulnerability in Cisco WebEx Training Center allows remote attackers to hijack the authentication of unspecified victims via unknown vectors, aka Bug ID CSCul25567.

Cisco WebEx Training Center allows remote attackers to discover session numbers, and bypass host approval for audio-conference attendance, by reading HTML source code, aka Bug ID CSCul57126.

The registration component in Cisco WebEx Training Center provides the training-session URL before payment is completed, which allows remote attackers to bypass intended access restrictions and join an audio conference by entering credential fields from this URL, aka Bug ID CSCul57111.

Cisco WebEx Training Center provides different error messages for registration attempts depending on whether the e-mail address exists, which allows remote attackers to enumerate attendees via a series of requests, aka Bug ID CSCul36003.

Open redirect vulnerability in Cisco WebEx Training Center allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors, aka Bug ID CSCul57140.

The training-registration page in Cisco WebEx Training Center allows remote attackers to modify unspecified fields via unknown vectors, aka Bug ID CSCul35990.