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I. Basic Information for CVE-2025-11777
Vulnerability Information

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Vulnerability Title
Cross-team channel membership access
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
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 10.11.3及之前的10.11.x版本和10.5.11及之前的10.5.x版本存在安全漏洞,该漏洞源于未正确验证团队成员权限,可能导致访问其他团队用户元数据。
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 10.11.0 ~ 10.11.3 -
II. Public POCs for CVE-2025-11777
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III. Intelligence Information for CVE-2025-11777
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IV. Related Vulnerabilities
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