CVE-2021-40115: Cisco Webex Video Mesh Cross-Site Scripting Vulnerability

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-04 · updated 2026-06-17
Weakness: CWE-79

Description

A vulnerability in Cisco Webex Video Mesh could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

Affected products

Cisco Collaboration Meeting Rooms: 2.0
Cisco Webex Video Mesh: before 2021.10.18.2439m — fixed in 2021.10.18.2439m

How to fix

Upgrade to a fixed version: Cisco Webex Video Mesh 2021.10.18.2439m. Check the vendor advisory for mitigations.

References

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