CVE-2024-24776— Incorrect Authorization leads to Channel Member Count Leak
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I. Basic Information for CVE-2024-24776
Vulnerability Information
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Vulnerability Title
Incorrect Authorization leads to Channel Member Count Leak
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.
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
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，该漏洞源于无法检查 POST /api/v4/channels/stats/member_count API 中所需的权限，导致信息泄露。
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 ~ 8.1.7 | - |
II. Public POCs for CVE-2024-24776
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2024-02-09 · 4 CVEs total
| CVE-2024-1402 | 4.3 MEDIUM | Denial of service in mattermost mobile apps and server via emoji reactions |
| CVE-2024-23319 | 3.5 LOW | CSRF issue allows disconnecting a user's Jira connection through a simple post message (Ji |
| CVE-2024-24774 | 3.4 LOW | Missing authorization allows users to access arbitrary security levels on Jira through web |
IV. Related Vulnerabilities
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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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V. Comments for CVE-2024-24776
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