CVE-2024-1888— Existing server guests invited to the team by members without "invite_guest" permission
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I. Basic Information for CVE-2024-1888
Vulnerability Information
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Vulnerability Title
Existing server guests invited to the team by members without "invite_guest" permission
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost fails to check the "invite_guest" permission when inviting guests of other teams to a team, allowing a member with permissions to add other members but not to add guests to add a guest to a team as long as the guest was already a guest in another team of the server
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，该漏洞源于在邀请其他团队的人加入团队时无法检查“invite_guest”权限。
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 ~ 9.4.1 | - |
II. Public POCs for CVE-2024-1888
| # | 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-2024-1887 | 4.3 MEDIUM | Public channel post content accessible without membership when compliance export is enable |
| CVE-2024-24988 | 4.3 MEDIUM | Excessive resource consumption when sending long emoji names in user custom status |
| 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
Same product: 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 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
- CVE-2026-8233
Dotouch XproUPF access control - CVE-2026-42569
phpvms: /importer authorization bypass causing full database - CVE-2026-42205
Avo: Broken Access Control: Unauthorized Execution of Arbitr - CVE-2026-41487
Langfuse: Improper role-based-access control in Langfuse LLM - CVE-2026-42278
UltraDAG: Smart Account Spending Policy Bypass via Pockets
V. Comments for CVE-2024-1888
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