Identity Services Engine

CVE-2024-20539: Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability

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.

Published

ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 4.8
EPSS0.27%Chance of exploitation in 30 days
Public exploitNot tracked
FixNot yet

Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.

Affected and fixed versions

Product / branchFixed in
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.3See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.0See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.1See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.2See the advisory
Cisco Identity Services Engine Software 3.3 Patch 2See the advisory
Cisco Identity Services Engine Software 3.3 Patch 1See the advisory

Always confirm against the vendor advisory, which lists every fixed hotfix.

What it is

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.

Exploitation

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Sources

KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.

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