CVE-2024-29221— Invite ID available to team admins even without the "Add Members" permission
Quick assessment
Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Mattermost Server是美国Mattermost公司的一套开源的消息传递平台。 Mattermost Server 9.5.2 之前、9.4.4 之前、9.3.3 之前、8.1.11 之前版本存在安全漏洞，该漏洞源于 /api/v4/ 中缺乏适当的访问控制，users/me/teams 端点允许团队管理员获取其团队的邀请 ID，从而允许他们邀请用户。
Possible ATT&CK Techniques 1 AI
T1078.004 · Cloud Accounts
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I. Basic Information for CVE-2024-29221
Vulnerability Information
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Vulnerability Title
Invite ID available to team admins even without the "Add Members" permission
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Access Control in Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 lacked proper access control in the `/api/v4/users/me/teams` endpoint allowing a team admin to get the invite ID of their team, thus allowing them to invite users, even if the "Add Members" permission was explicitly removed from team admins.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Server是美国Mattermost公司的一套开源的消息传递平台。 Mattermost Server 9.5.2 之前、9.4.4 之前、9.3.3 之前、8.1.11 之前版本存在安全漏洞，该漏洞源于 /api/v4/ 中缺乏适当的访问控制，users/me/teams 端点允许团队管理员获取其团队的邀请 ID，从而允许他们邀请用户。
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 | 9.5.0 ~ 9.5.1 | - |
|
II. Public POCs for CVE-2024-29221
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Mattermost · 2024-04-05 · 4 CVEs total
| CVE-2024-2447 | 6.5 MEDIUM | Mattermost 安全漏洞 |
| CVE-2024-28949 | 4.3 MEDIUM | DoS via a large number of User Preferences |
| CVE-2024-21848 | 3.1 LOW | Users maintain access to active call after being removed from a channel |
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Same vendor: Mattermost
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CVE-2026-96260
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CVE-2026-12284
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Same weakness: CWE-284
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V. Comments for CVE-2024-29221
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