CVE-2024-20539 Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability
An authenticated attacker with admin credentials can inject malicious scripts into the Cisco ISE web interface, allowing script execution or data theft in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-20539?
CVE-2024-20539 is a medium-severity cross-site scripting vulnerability in Cisco Identity Services Engine, published on 6 Nov 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2024-20539?
It affects 1 product.
Products include Cisco Identity Services Engine.
How do I fix CVE-2024-20539?
No fix has been published for CVE-2024-20539 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-20539 being exploited?
There is no known exploitation of CVE-2024-20539 in the wild and no public exploit code.
Other vulnerabilities in Cisco Identity Services Engine
- CVE-2026-76460 Cisco Identity Services Engine Incorrect Use of Privileged APIs
- CVE-2025-20337 Cisco Identity Services Engine Injection
- CVE-2025-20281 Cisco Identity Services Engine Injection
- CVE-2026-20130 Cisco Identity Services Engine Hardening Release - Improper Neutralization Vulnerabilities
- CVE-2026-20192 Cisco Identity Services Engine Hardening Release - Access Control Vulnerabilities
Sources
Also known as GHSA-fj4q-693m-8fx4.