Cisco Webex Meetings Cross-Site Scripting Vulnerability
Summary
| CVE | CVE-2026-20233 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-03 18:16:20 UTC |
| Updated | 2026-06-04 13:54:40 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.1 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| 3.1 | CNA | CVSSV3_1 | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco Webex Meetings | affected 39.7.7 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.9 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.4.10 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.6 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.6.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.8.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.8.4 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.11 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.7.4 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.9.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.4 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.6 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.7 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.8 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.8.3 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 40.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 39.10 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.6 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.7 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.8 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.9 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.10 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.11 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 42.12 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.3 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.4 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.4.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.4.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.5.0 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.6.0 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.6.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.7 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.8 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.9 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.10 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.11 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 43.12 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.3 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.4 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.5 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.6 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.7 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.8 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.9 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.10 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.11 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 44.12 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 45.1 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 45.2 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 45.3 | Not specified |
| CNA | Cisco | Cisco Webex Meetings | affected 45.4 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
There are currently no legacy QID mappings associated with this CVE.