CVE-2026-20233: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Cisco Cisco Webex Meetings
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.
AI Analysis
Technical Summary
This vulnerability in Cisco Webex Meetings' web interface stems from improper neutralization of input during web page generation, enabling cross-site scripting attacks. An attacker could exploit this by tricking a user into clicking a malicious link, leading to script execution in the user's browser or access to sensitive browser-based information. Cisco has remediated the issue within the Webex Meetings service itself, so no patch or update is needed from customers.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the victim's browser session, potentially leading to theft of sensitive information or session hijacking. However, the vulnerability requires user interaction (clicking a malicious link) and is rated medium severity with a CVSS score of 6.1. There are no known exploits in the wild at this time.
Mitigation Recommendations
Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed. Users and administrators should ensure they are using the latest version of the service as provided by Cisco. Since this is not a cloud service and no patch links or remediation level are specified, customers should monitor Cisco advisories for any updates but currently no direct remediation is required.
CVE-2026-20233: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Cisco Cisco Webex Meetings
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.
CVSS v3.1
Score 6.1medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Cisco Webex Meetings' web interface stems from improper neutralization of input during web page generation, enabling cross-site scripting attacks. An attacker could exploit this by tricking a user into clicking a malicious link, leading to script execution in the user's browser or access to sensitive browser-based information. Cisco has remediated the issue within the Webex Meetings service itself, so no patch or update is needed from customers.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the victim's browser session, potentially leading to theft of sensitive information or session hijacking. However, the vulnerability requires user interaction (clicking a malicious link) and is rated medium severity with a CVSS score of 6.1. There are no known exploits in the wild at this time.
Mitigation Recommendations
Cisco has addressed this vulnerability in the Webex Meetings service, and no customer action is needed. Users and administrators should ensure they are using the latest version of the service as provided by Cisco. Since this is not a cloud service and no patch links or remediation level are specified, customers should monitor Cisco advisories for any updates but currently no direct remediation is required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.399Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a206578e29bf47b50d40fa0
Added to database: 6/3/2026, 5:33:44 PM
Last enriched: 6/3/2026, 5:49:54 PM
Last updated: 6/4/2026, 4:02:24 AM
Views: 8
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