CVE-2021-1420: Cisco Webex Meetings

Medium severity, CVSS 4.7. EPSS: 0.9% chance of exploitation in the next 30 days.

A vulnerability in certain web pages of Cisco Webex Meetings could allow an unauthenticated, remote attacker to modify a web page in the context of a user's browser. The vulnerability is due to improper checks on parameter values in affected pages. An attacker could exploit this vulnerability by persuading a user to follow a crafted link that is designed to pass HTML code into an affected parameter. A successful exploit could allow the attacker to alter the contents of a web page to redirect the user to potentially malicious websites, or the attacker could use this vulnerability to conduct further client-side attacks.

Affected products

• Cisco Webex Meetings: affected versions not specified

Published 2021-04-08. Last modified 2026-06-17.