CVE-2025-12559— Information Disclosure in Common Teams API
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，该漏洞源于团队电子邮件地址清理不足，可能导致信息泄露。以下版本受到影响：11.0.2及之前的11.0.x版本、10.12.1及之前的10.12.x版本、10.11.4及之前的10.11.x版本和10.5.12及之前的10.5.x版本。
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-12559
Vulnerability Information
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Vulnerability Title
Information Disclosure in Common Teams API
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
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
信息暴露
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，该漏洞源于团队电子邮件地址清理不足，可能导致信息泄露。以下版本受到影响：11.0.2及之前的11.0.x版本、10.12.1及之前的10.12.x版本、10.11.4及之前的10.11.x版本和10.5.12及之前的10.5.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 | 11.0.0 ~ 11.0.2 | - |
|
II. Public POCs for CVE-2025-12559
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2025-11-27 · 3 CVEs total
| CVE-2025-12419 | 9.9 CRITICAL | Account takeover on OAuth/OpenID-enabled servers |
| CVE-2025-12421 | 9.9 CRITICAL | Account Takeover via Code Exchange Endpoint |
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V. Comments for CVE-2025-12559
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