CVE-2025-9076

Mattermost Server exposes sensitive user credentials during shared channel membership synchronization

CVSS 6.5 MEDIUMEPSS 0.2%CWE-862

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 6.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

15 sep 2025Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Productos afectados

Mattermost · Mattermost

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Referencias

https://mattermost.com/security-updates