CVE-2026-20233
Reflected XSS in Cisco Webex Meetings
Publication date: 2026-06-03
Last updated on: 2026-06-03
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | webex_meetings | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability could have allowed an attacker to execute arbitrary script code in the browser of the targeted user or access sensitive, browser-based information due to insufficient validation of user input.
Such unauthorized access to sensitive information could potentially impact compliance with standards and regulations like GDPR or HIPAA, which require protection of personal and sensitive data.
However, Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.
Can you explain this vulnerability to me?
This vulnerability exists in the web-based user interface of Cisco Webex Meetings and is a cross-site scripting (XSS) flaw. It occurs because the application does not sufficiently validate user input. An unauthenticated, remote attacker could exploit this by tricking a user into clicking a malicious link, which would then allow the attacker to execute arbitrary script code in the user's browser or access sensitive information stored in the browser.
How can this vulnerability impact me? :
If exploited, this vulnerability could allow an attacker to run malicious scripts in the context of the victim's browser session. This could lead to unauthorized access to sensitive browser-based information or actions performed on behalf of the user without their consent. The impact includes potential data theft, session hijacking, or other malicious activities that compromise user security and privacy.
What immediate steps should I take to mitigate this vulnerability?
Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed.