CVE-2023-5631

Estado: AnalizadaMedia (5.4)⚠ Explotación activa

Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker

to load arbitrary JavaScript code.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Puntuación base: 5.4

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 76%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 6/10/2026

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).

CISA KEV — explotada activamente

Añadida al catálogo: 26/10/2023
Plazo de remediación: 16/11/2023
Uso conocido en ransomware: Unknown

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1189 Drive-by Compromiseinitial access95 %
Impacto principalT1059.007 JavaScriptexecution85 %
Impacto secundarioT1005 Data from Local Systemcollection60 %

XSS almacenado (CWE-79) en Roundcube vía SVG en email permite ejecución de JavaScript arbitrario en navegador (T1189, AV:N). Acceso a datos del cliente como efecto secundario.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based Content User Training Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program Application Isolation and Sandboxing

Tecnologías afectadas (3)

Debian — Debian Linux Fedoraproject — Fedora Roundcube — Webmail

CWE

CWE-79
CWE-79

Referencias

JSON original (NVD)

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