CVE-2026-20233
MediumCVSS 6.1Summary
A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.
Risk Assessment
This vulnerability existed because of insufficient validation of user input, which could have allowed an attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.
Recommendation
It is recommended that administrators ensure they are using the latest version of Cisco Webex Meetings to avoid potential risks associated with this vulnerability.
Original NVD description (English source)
A vulnerability in the web-based user interface of Cisco Webex Meetings could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed. This vulnerability existed because of insufficient validation of user input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information.