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

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

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

Ciclo de vida

15 set 2025Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

Mattermost · Mattermost

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Referências

https://mattermost.com/security-updates