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CVE-2026-26953

Estado: AnalizadaMedia (5.4)—

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.0 and above have a Stored HTML Injection vulnerability in the active sessions table located on the API settings page, allowing an attacker with valid credentials to inject arbitrary HTML code that will be rendered in the browser of any administrator who visits the active sessions page. The rowCallback function contains the value data.x_forwarded_for, which is directly concatenated into an HTML string and inserted into the DOM using jQuery’s .html() method.

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This method interprets the content as HTML, which means that any HTML tags present in the value will be parsed and rendered by the browser. An attacker can use common tools such as curl, wget, Python requests, Burp Suite, or even JavaScript fetch() to send an authentication request with an X-Forwarded-For header that contains malicious HTML code instead of a legitimate IP address. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited to pure HTML injection without the ability to execute scripts. This issue has been fixed in version 6.4.1.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Pi-hole — WEB Interface

CWE

Referencias

JSON original (NVD)

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          "version": "2.0.3",
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      "value": "Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application.  Versions 6.0 and above have a Stored HTML Injection vulnerability in the active sessions table located on the API settings page, allowing an attacker with valid credentials to inject arbitrary HTML code that will be rendered in the browser of any administrator who visits the active sessions page. The rowCallback function contains the value data.x_forwarded_for, which is directly concatenated into an HTML string and inserted into the DOM using jQuery’s .html() method. This method interprets the content as HTML, which means that any HTML tags present in the value will be parsed and rendered by the browser. An attacker can use common tools such as curl, wget, Python requests, Burp Suite, or even JavaScript fetch() to send an authentication request with an X-Forwarded-For header that contains malicious HTML code instead of a legitimate IP address. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited to pure HTML injection without the ability to execute scripts. This issue has been fixed in version 6.4.1."
    },
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      "lang": "es",
      "value": "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. Las versiones 6.0 y superiores tienen una vulnerabilidad de inyección HTML almacenada en la tabla de sesiones activas ubicada en la página de configuración de la API, permitiendo a un atacante con credenciales válidas inyectar código HTML arbitrario que se renderizará en el navegador de cualquier administrador que visite la página de sesiones activas. La función rowCallback contiene el valor data.x_forwarded_for, que se concatena directamente en una cadena HTML y se inserta en el DOM utilizando el método .html() de jQuery. Este método interpreta el contenido como HTML, lo que significa que cualquier etiqueta HTML presente en el valor será analizada y renderizada por el navegador. Un atacante puede usar herramientas comunes como curl, wget, Python requests, Burp Suite, o incluso JavaScript fetch() para enviar una solicitud de autenticación con una cabecera X-Forwarded-For que contiene código HTML malicioso en lugar de una dirección IP legítima. Dado que Pi-hole implementa una Política de Seguridad de Contenido (CSP) que bloquea JavaScript en línea, el impacto se limita a la inyección de HTML puro sin la capacidad de ejecutar scripts. Este problema ha sido solucionado en la versión 6.4.1."
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  ],
  "lastModified": "2026-06-17T10:26:26.537",
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