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CVE-2025-56515

Estado: AnalizadaAlta (8.8)—

File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality. The application fails to validate SVG file content, allowing malicious SVG files with embedded foreignObject elements containing iframe tags and JavaScript event handlers (onmouseover) to be uploaded and stored. When rendered, these SVG files execute arbitrary JavaScript, enabling attackers to steal user sessions, cookies, and perform unauthorized actions in the context of users viewing affected profiles.

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).

🎯 Técnicas ATT&CK

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

XSS almacenado en SVG con JavaScript (onmouseover) en navegador del usuario. UI:R + CWE-79 confirma T1189. Impactos: ejecución JS en navegador (T1059.007), potencial web shell si la plataforma lo permite (T1505.003), y robo de sesiones/cookies (consulta/credenciales T1012).

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 ContentDisable or Remove Feature or ProgramUser TrainingUser Account ManagementExecution PreventionBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Suisuijiang — Fiora

CWE

Referencias

JSON original (NVD)

Mostrar
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