CVE-2025-12421criticalCWE-303

CVE-2025-12421: fallo crítico en Mattermost

Account Takeover via Code Exchange Endpoint

Publicada el · Actualizada el

28Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 9.9epss 0.3%
probabilidad de explotación
0.3%top 74% de las CVE
explotación observada
noninguna fuente lo reporta
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Productos afectados
Mattermost · Mattermost
CVEs relacionadas — Mattermost

En el mismo producto, de las más peligrosas a las menos.

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Referencias
https://mattermost.com/security-updates