CVE-2023-20104: Cisco Webex Teams

Medium severity, CVSS 6.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in the file upload functionality of Cisco Webex App for Web could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending an arbitrary file to a user and persuading that user to browse to a specific URL. 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 Teams: affected versions not specified

Published 2023-03-03. Last modified 2026-06-17.