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I. Basic Information for CVE-2025-0503
Vulnerability Information

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Vulnerability Title
Leaked User IDs and Metadata of Deleted DMs
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 9.11.x <= 9.11.6 fail to filter out DMs from the deleted channels endpoint which allows an attacker to infer user IDs and other metadata from deleted DMs if someone had manually marked DMs as deleted in the database.
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
对因果或异常条件的不恰当检查
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 9.11.x至9.11.6版本存在安全漏洞,该漏洞源于未从已删除频道端点过滤私聊(DM)信息,可能泄露用户ID等元数据。
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 9.11.0 ~ 9.11.6 -
II. Public POCs for CVE-2025-0503
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III. Intelligence Information for CVE-2025-0503
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IV. Related Vulnerabilities
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