CVE-2021-1500

CVE-2021-1500 is a medium-severity vulnerability in Cisco Collaboration Meeting Rooms with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

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.

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 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-1500 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1500?
CVE-2021-1500 primarily affects Cisco Collaboration Meeting Rooms. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1500?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-1500 published?
CVE-2021-1500 was published on 2021-11-04 and last updated on 2026-06-17.

References

Affected products (2)

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