CVE-2026-54355

Gravedad CVSS v4.0:

MEDIA

Tipo:

CWE-79 Neutralización incorrecta de la entrada durante la generación de la página web (Cross-site Scripting)

Fecha de publicación:

17/09/2026

Última modificación:

30/09/2026

Descripción

*** Pendiente de traducción *** MapServer is a system for developing web-based GIS applications. From 6.0 until 8.6.4, MapServer&#39;s OpenLayers HTML output for SERVICE=WMS&REQUEST=GetMap&FORMAT=application/openlayers reflects an attacker-controlled X-Forwarded-Host value received as HTTP_X_FORWARDED_HOST through msBuildOnlineResource(), processLine(), and the [mapserv_onlineresource] substitution in src/maputil.c and src/maptemplate.c without escaping it for a single-quoted JavaScript string. When the deployment trusts the forwarded header and does not configure a fixed ows_onlineresource or MS_ONLINERESOURCE value, embedded single quotes can escape the generated URL string. An unauthenticated attacker can craft a URL that executes arbitrary JavaScript in the MapServer site origin when opened by a victim, enabling access to sessions or tokens, same-origin data and requests, and actions as the victim. This issue is fixed in version 8.6.4.

Impacto

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N CVSS v4.0 Severidad y Métricas:

Puntuación base: 5.30 MEDIA
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Vector de acceso (AV): A través de red
Complejidad de acceso (AC): Bajo
Attack Requirements (AT): Present
Privilegios Requeridos (PR): Ninguno
Interacción del usuario (UI): Passsive
Confidentiality (VC): Ninguno
Integrity (VI): Ninguno
Availability (VA): Ninguno
Confidentiality (SC): Alto
Integrity (SI): Alto
Availability (SA): Ninguno

Puntuación base 4.0

5.30

Gravedad 4.0

MEDIA

CVE-2026-54355

Descripción

Impacto

Referencias a soluciones, herramientas e información