CVE-2025-20204: Cisco Identity Services Engine

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

Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) guest portals could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit these vulnerabilities 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 these vulnerabilities, the attacker must have valid administrative credentials.

Affected products

• Cisco Identity Services Engine: from 3.0.0, before 3.2 (fixed in 3.2); version 3.2.0 only; version 3.3.0 only; version 3.4.0 only

Published 2025-02-05. Last modified 2026-07-21.