CVE-2026-33403

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected <form> elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59	Vendor Advisory
https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*

History

26 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) La Interfaz de administración de Pi-hole es una interfaz web para gestionar Pi-hole, una aplicación de bloqueo de anuncios y rastreadores de internet a nivel de red. Desde la 6.0 hasta antes de la 6.5, una vulnerabilidad de XSS reflejado basado en DOM en taillog.js permite a un atacante no autenticado inyectar HTML arbitrario en la interfaz de administración de Pi-hole mediante la creación de una URL maliciosa. El parámetro de consulta file se interpola en una asignación de innerHTML sin escape. Debido a que la Content-Security-Policy carece de la directiva form-action, los elementos [form] inyectados pueden exfiltrar credenciales a un origen externo. Esta vulnerabilidad está corregida en la 6.5.

Information

Published : 2026-04-06 15:17

Updated : 2026-10-26 22:10

NVD link : CVE-2026-33403

Mitre link : CVE-2026-33403

CVE.ORG link : CVE-2026-33403

JSON object : View

Products Affected

pi-hole

web_interface

CWE

CWE-79

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

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