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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Webex Meetings unknown
Version Status Constraints
39.7.7 affected —
39.9 affected —
40.4.10 affected —
39.6 affected —
40.6.2 affected —
39.8.2 affected —
39.8.4 affected —
40.1 affected —
39.11 affected —
39.7.4 affected —
39.9.1 affected —
40.4 affected —
40.6 affected —
39.7 affected —
39.8 affected —
39.8.3 affected —
40.2 affected —
39.10 affected —
42.6 affected —
42.7 affected —
42.8 affected —
42.9 affected —
42.10 affected —
42.11 affected —
42.12 affected —
43.1 affected —
43.2 affected —
43.3 affected —
43.4 affected —
43.4.1 affected —
43.4.2 affected —
43.5.0 affected —
43.6.0 affected —
43.6.1 affected —
43.7 affected —
43.8 affected —
43.9 affected —
43.10 affected —
43.11 affected —
43.12 affected —
44.1 affected —
44.2 affected —
44.3 affected —
44.4 affected —
44.5 affected —
44.6 affected —
44.7 affected —
44.8 affected —
44.9 affected —
44.10 affected —
44.11 affected —
44.12 affected —
45.1 affected —
45.2 affected —
45.3 affected —
45.4 affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-xss-jw3NeQzS cve-icon cve-icon
History

Wed, 03 Jun 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title Cisco Webex Meetings Cross-Site Scripting Vulnerability
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-06-03T17:49:49.471Z

Reserved: 2025-10-08T11:59:15.399Z

Link: CVE-2026-20233

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-03T18:16:20.320

Modified: 2026-06-03T18:16:20.320

Link: CVE-2026-20233

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses