CVE-2023-20133: Cisco Webex Meetings

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in the web interface of Cisco Webex Meetings could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because of insufficient validation of user-supplied input in Webex Events (classic) programs, email templates, and survey questions. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

Affected products

• Cisco Webex Meetings: version 39.6 only; version 39.7 only; version 39.7.4 only; version 39.7.7 only; version 39.8 only; version 39.8.2 only; …

Published 2023-07-07. Last modified 2026-06-17.