Preview Tool

Cisco Bug: CSCuj40321 - Incorrect CAPTCHA Implementation Allows User Enumeration

Last Modified

Aug 06, 2018

Products (1)

  • Cisco Webex Meetings Server

Known Affected Releases


Description (partial)

A vulnerability in the log on form of Cisco WebEx Meetings Server could allow an unauthenticated, remote attacker to enumerate valid user accounts.

The vulnerability is due to failure of refresh of the CAPTCHA. An attacker could exploit this vulnerability by conducting unlimited user ID
guessing attempts against a vulnerable server.

Device configured with default configuration.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.