CVE-2024-20539: Cisco Identity Services Engine

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to conduct a stored XSS attack against a user of the interface. This vulnerability exists because the web-based management interface does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker would need valid administrative credentials on an affected device.

Affected products

• Cisco Identity Services Engine: version 3.0.0 only; version 3.1.0 only; version 3.2.0 only; version 3.3.0 only

Published 2024-11-06. Last modified 2026-06-17.