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CVE-2025-11794— Password hash and MFA secret returned in user email verification endpoint

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 10.11.3及之前的10.11.x版本、10.5.11及之前的10.5.x版本和10.12.0及之前的10.12.x版本存在安全漏洞，该漏洞源于未清理用户数据，可能导致系统管理员访问密码哈希和MFA密钥。

CVSS 4.9 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-11794

Vulnerability Information
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Vulnerability Title
Password hash and MFA secret returned in user email verification endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/{user_id}/email/verify/member endpoint
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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 10.11.3及之前的10.11.x版本、10.5.11及之前的10.5.x版本和10.12.0及之前的10.12.x版本存在安全漏洞，该漏洞源于未清理用户数据，可能导致系统管理员访问密码哈希和MFA密钥。
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 10.11.0 ~ 10.11.3 -

II. Public POCs for CVE-2025-11794

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III. Intelligence Information for CVE-2025-11794

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Same Patch Batch · Mattermost · 2025-11-14 · 5 CVEs total

CVE-2025-55070 6.5 MEDIUM Lack of MFA enforcement in WebSocket connections
CVE-2025-55073 5.4 MEDIUM MS Teams plugin OAuth allows editing arbitrary posts
CVE-2025-11776 4.3 MEDIUM Guest user can discover archived public channels
CVE-2025-41436 3.1 LOW Unauthorized access to archived channel content via threads interface

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-200

V. Comments for CVE-2025-11794

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