CVE-2020-3441: Cisco Webex Meetings and Cisco Webex Meetings Server Information Disclosure Vulnerability

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-11-18 · updated 2026-06-17
Weakness: CWE-20

Description

A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to view sensitive information from the meeting room lobby. This vulnerability is due to insufficient protection of sensitive participant information. An attacker could exploit this vulnerability by browsing the Webex roster. A successful exploit could allow the attacker to gather information about other Webex participants, such as email address and IP address, while waiting in the lobby.

Affected products

Cisco Webex Meetings: through 40.6.11; through 40.11.3
Cisco WebEx Meetings Server: before 3.0; 3.0-maintenance_release2, 3.0-maintenance_release3, 4.0, 4.0-maintenance_release1, 4.0-maintenance_release2 — fixed in 3.0

How to fix

Upgrade to a fixed version: Cisco WebEx Meetings Server 3.0. Check the vendor advisory for mitigations.

References

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