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CVE-2021-32735

Estado: ModificadaMedia (5.4)—

Kirby is a content management system. In Kirby CMS versions 3.5.5 and 3.5.6, the Panel's `ListItem` component (used in the pages and files section for example) displayed HTML in page titles as it is. This could be used for cross-site scripting (XSS) attacks. Malicious authenticated Panel users can escalate their privileges if they get access to the Panel session of an admin user. Visitors without Panel access can use the attack vector if the site allows changing site data from a frontend form. Kirby 3.5.7 patches the vulnerability. As a partial workaround, site administrators can protect against attacks from visitors without Panel access by validating or sanitizing provided data from the frontend form.

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)

Getkirby — Kirby

CWE

Referencias

JSON original (NVD)

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      "value": "Kirby is a content management system. In Kirby CMS versions 3.5.5 and 3.5.6, the Panel's `ListItem` component (used in the pages and files section for example) displayed HTML in page titles as it is. This could be used for cross-site scripting (XSS) attacks. Malicious authenticated Panel users can escalate their privileges if they get access to the Panel session of an admin user. Visitors without Panel access can use the attack vector if the site allows changing site data from a frontend form. Kirby 3.5.7 patches the vulnerability. As a partial workaround, site administrators can protect against attacks from visitors without Panel access by validating or sanitizing provided data from the frontend form."
    },
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      "value": "Kirby es un sistema de administración de contenidos. En las versiones 3.5.5 y 3.5.6 de Kirby CMS, el componente \"ListItem\" del Panel (usado en la sección de páginas y archivos, por ejemplo) mostraba HTML en los títulos de las páginas tal cual. Esto podía ser usado para ataques de tipo cross-site scripting (XSS). Unos usuarios autenticados maliciosos del Panel pueden escalar sus privilegios si consiguen acceder a la sesión del Panel de un usuario administrador. Unos visitantes sin acceso al Panel pueden usar el vector de ataque si el sitio permite cambiar los datos del sitio desde un formulario del frontend. Kirby versión 3.5.7 parchea la vulnerabilidad. Como solución alternativa parcial, los administradores del sitio pueden protegerse contra los ataques de visitantes sin acceso al Panel al comprobar o sanear los datos proporcionados desde el formulario frontend"
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  "lastModified": "2026-06-17T03:53:31.600",
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