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CVE-2025-3227— Unauthorized channel member management through playbook runs

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，该漏洞源于未正确执行频道成员管理权限，可能导致未经授权的用户添加或删除频道成员。以下版本受到影响：10.5.5及之前的10.5.x版本、9.11.15及之前的9.11.x版本、10.8.0及之前的10.8.x版本、10.7.2及之前的10.7.x版本和10.6.5及之前的10.6.x版本。

CVSS 4.3 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1098.003 · Additional Cloud Roles
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I. Basic Information for CVE-2025-3227

Vulnerability Information
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Vulnerability Title
Unauthorized channel member management through playbook runs
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
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，该漏洞源于未正确执行频道成员管理权限，可能导致未经授权的用户添加或删除频道成员。以下版本受到影响：10.5.5及之前的10.5.x版本、9.11.15及之前的9.11.x版本、10.8.0及之前的10.8.x版本、10.7.2及之前的10.7.x版本和10.6.5及之前的10.6.x版本。
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 10.5.0 ~ 10.5.5 -

II. Public POCs for CVE-2025-3227

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III. Intelligence Information for CVE-2025-3227

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Same Patch Batch · Mattermost · 2025-06-20 · 3 CVEs total

CVE-2025-4981 9.9 CRITICAL Path Traversal Leading to RCE by Any Authenticated Mattermost User
CVE-2025-3228 4.3 MEDIUM Unauthorized Guest user access to Playbook

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-863

V. Comments for CVE-2025-3227

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