CVE-2026-20233
Cisco Webex Meetings Cross-Site Scripting Vulnerability
Description
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.
Weakness: CWE-79
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Webex | Other Products | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Webex Meetings
Vendor advisory
Cisco Webex Meetings Cross-Site Scripting Vulnerability
Cisco’s rating: Medium (advisory CVSS 6.1) · Published Jun 3, 2026
Bug ID: CSCwt96631
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from