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CVE-2026-20233

Severity CVSS v4.0:
Pending analysis
Type:
CWE-79 Cross-Site Scripting (XSS)
Publication date:
03/06/2026
Last modified:
08/06/2026

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.<br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
6.10
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cisco:webex_meetings:39.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.7.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.8.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.9.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.9.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.10.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:39.11.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings:40.4.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools