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I. Basic Information for CVE-2025-11776
Vulnerability Information

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Vulnerability Title
Guest user can discover archived public channels
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/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 11之前版本存在安全漏洞,该漏洞源于未能正确限制对归档频道搜索API的访问,可能导致访客用户发现归档公共频道。
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 <11 ~ <11 -
II. Public POCs for CVE-2025-11776
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III. Intelligence Information for CVE-2025-11776
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IV. Related Vulnerabilities
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