CVE-2025-62800

MEDIUM

6.1

Descripcion

FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page (oauth_callback.py) where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScript execution in the callback server origin. The issue is fixed in version 2.13.0.

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

Publicado10/28/2025

Ultima modificacion11/7/2025

Fuentenvd

Avistamientos honeypot0

Productos afectados

jlowin:fastmcp

Debilidades (CWE)

CWE-79

Referencias

https://github.com/jlowin/fastmcp/security/advisories/GHSA-mxxr-jv3v-6pgc(security-advisories@github.com)

https://github.com/jlowin/fastmcp/security/advisories/GHSA-mxxr-jv3v-6pgc(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlaciones IOC

Sin correlaciones registradas

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