CVE-2025-40902

A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://security.nozominetworks.com/NN-2026:5-01	Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-827968.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nozominetworks:cmc::::::::
	cpe:2.3:a:nozominetworks:guardian::::::::

History

14 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de inyección HTML Almacenada fue descubierta en la funcionalidad de Usuarios debido a la validación incorrecta de un parámetro de entrada. Un usuario autenticado con privilegios administrativos puede crear un usuario malicioso cuyo nombre de usuario contiene etiquetas HTML. Cuando una víctima intenta eliminar un grupo que contiene al usuario afectado, el HTML inyectado se renderiza en su navegador, lo que permite ataques de phishing y posiblemente de redirección abierta. La explotación completa de XSS y la revelación directa de información se evitan por la validación de entrada existente y la configuración de la Política de Seguridad de Contenido.

Information

Published : 2026-05-19 14:16

Updated : 2026-10-14 13:10

NVD link : CVE-2025-40902

Mitre link : CVE-2025-40902

CVE.ORG link : CVE-2025-40902

JSON object : View

Products Affected

nozominetworks

guardian
cmc

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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