CVE-2025-20303 Cross-site scripting in Cisco Identity Services Engine Software
Authenticated attackers can inject malicious scripts into Cisco ISE web interface, enabling arbitrary code execution or data theft.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-20303?
CVE-2025-20303 is a medium-severity cross-site scripting vulnerability in Cisco Identity Services Engine, published on 5 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Multiple vulnerabilities in the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to conduct a reflected XSS attack 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 at least a low-privileged account on the affected device.
Weakness: CWE-79
Which versions are affected by CVE-2025-20303?
It affects 1 product.
Products include Cisco Identity Services Engine.
How do I fix CVE-2025-20303?
No fix has been published for CVE-2025-20303 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-2025-20303 being exploited?
There is no known exploitation of CVE-2025-20303 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-jpv8-hv7x-q4mr.