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I. Basic Information for CVE-2025-9076
Vulnerability Information

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Vulnerability Title
Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost 10.10.1及之前的10.10.x版本存在安全漏洞,该漏洞源于共享通道成员同步期间未正确清理用户数据,可能导致恶意或受攻击的远程集群通过未清理的用户对象访问敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
MattermostMattermost 10.10.0 ~ 10.10.1 -
II. Public POCs for CVE-2025-9076
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III. Intelligence Information for CVE-2025-9076
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IV. Related Vulnerabilities
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