CVE-2020-3501: Cisco Webex Meetings Desktop App Information Disclosure Vulnerabilities

Severity: medium (CVSS 4.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-08-17 · updated 2026-06-17
Weakness: CWE-20

Description

Multiple vulnerabilities in the user interface of Cisco Webex Meetings Desktop App could allow an authenticated, remote attacker to obtain restricted information from other Webex users. These vulnerabilities are due to improper input validation of parameters returned to the application from a web site. An attacker with a valid Webex account could exploit these vulnerabilities by persuading a user to follow a URL that is designed to return malicious path parameters to the affected software. A successful exploit could allow the attacker to obtain restricted information from other Webex users.

Affected products

Cisco Webex Meetings: before 39.5.24; from 40.4.0 before 40.4.6; from 40.4.10 before 40.6.0; 39.7.4 — fixed in 39.5.24, 40.4.6, 40.6.0
Cisco WebEx Meetings Server: 3.0, 3.0-maintenance_release1, 3.0-maintenance_release2, 3.0-maintenance_release3, 4.0, 4.0-maintenance_release1 (+1)

How to fix

Upgrade to a fixed version: Cisco Webex Meetings 39.5.24, 40.4.6, 40.6.0. Check the vendor advisory for mitigations.

References

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