CVE-2026-31859

MEDIUM

6.1

Descripcion

Craft is a content management system (CMS). The fix for CVE-2025-35939 in craftcms/cms introduced a strip_tags() call in src/web/User.php to sanitize return URLs before they are stored in the session. However, strip_tags() only removes HTML tags (angle brackets) -- it does not inspect or filter URL schemes. Payloads like javascript:alert(document.cookie) contain no HTML tags and pass through strip_tags() completely unmodified, enabling reflected XSS when the return URL is rendered in an href attribute. This vulnerability is fixed in 5.9.7 and 4.17.3.

Detalles CVE

Puntuacion CVSS v3.16.1

SeveridadMEDIUM

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioREQUIRED

Publicado3/11/2026

Ultima modificacion3/17/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

craftcms:craft_cms

Debilidades (CWE)

CWE-79CWE-116

Referencias

https://github.com/craftcms/cms/security/advisories/GHSA-fvwq-45qv-xvhv(security-advisories@github.com)

Correlaciones IOC

Sin correlaciones registradas

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