CVE-2021-1500: Cisco Webex Video Mesh Arbitrary Site Redirection 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-601

Description

A vulnerability in the web-based management interface of Cisco Webex Video Mesh could allow an unauthenticated, remote attacker to redirect a user to a malicious web page. This vulnerability is due to improper input validation of the URL parameters in an HTTP request. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to redirect a user to a malicious website. Attackers may use this type of vulnerability, known as an open redirect attack, as part of a phishing attack to persuade users to unknowingly visit malicious sites.

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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