CVE-2021-1500: A vulnerability in the web-based management interface of Cisco Webex Video Mesh could allow an unauthenticated, remote attacker to redirect a user to ...

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.79%

51.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Collaboration Meeting Rooms	2.0
Cisco	Webex Video Mesh	< 2021.10.18.2439m

References

Timeline

Published: Nov 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1500?

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.

How severe is CVE-2021-1500?

CVE-2021-1500 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1500?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.