CVE-2024-1887— Public channel post content accessible without membership when compliance export is enabled
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I. Basic Information for CVE-2024-1887
Vulnerability Information
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Vulnerability Title
Public channel post content accessible without membership when compliance export is enabled
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost fails to check if compliance export is enabled when fetching posts of public channels allowing a user that is not a member of the public channel to fetch the posts, which will not be audited in the compliance export.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
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存在安全漏洞，该漏洞源于在获取公共频道的帖子时无法检查是否启用了合规性导出，允许非公共频道成员的用户获取帖子。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 0 ~ 8.1.8 | - |
II. Public POCs for CVE-2024-1887
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2024-02-29 · 9 CVEs total
| CVE-2024-23493 | 4.3 MEDIUM | Team associated AD/LDAP Groups Leaked due to missing authorization |
| CVE-2024-24988 | 4.3 MEDIUM | Excessive resource consumption when sending long emoji names in user custom status |
| CVE-2024-1888 | 4.3 MEDIUM | Existing server guests invited to the team by members without "invite_guest" permission |
| CVE-2024-1942 | 4.3 MEDIUM | Mattermost 安全漏洞 |
| CVE-2024-1953 | 4.3 MEDIUM | Mattermost 安全漏洞 |
| CVE-2024-23488 | 3.1 LOW | Files of archived channels accessible with the “Allow users to view archived channels” opt |
| CVE-2024-1952 | 3.1 LOW | Mattermost 安全漏洞 |
| CVE-2024-1949 | 2.6 LOW | Mattermost 安全漏洞 |
IV. Related Vulnerabilities
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Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same vendor: Mattermost
- CVE-2026-3590
Race Condition in Guest Magic Link Authentication Allows Tok - CVE-2026-28741
CSRF Protection Bypass Allows Updating a User's Authenticati - CVE-2026-27769
Connected Workspaces: Malicious remote server can manipulate - CVE-2026-24661
Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same weakness: CWE-284
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UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2024-1887
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