CVE-2025-13821— User profile update exposes password hash and MFA secrets
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I. Basic Information for CVE-2025-13821
Vulnerability Information
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Vulnerability Title
User profile update exposes password hash and MFA secrets
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
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 11.1.2及之前的11.1.x版本、10.11.9及之前的10.11.x版本和11.2.1及之前的11.2.x版本存在安全漏洞，该漏洞源于未清理WebSocket消息中的敏感数据，可能导致经过身份验证的用户通过个人资料昵称更新或电子邮件验证事件窃取密码哈希和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 | 11.1.0 ~ 11.1.2 | - |
II. Public POCs for CVE-2025-13821
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2026-02-16 · 7 CVEs total
| CVE-2026-1046 | 7.6 HIGH | Arbitrary application execution via unvalidated server-controlled URLs in Help menu |
| CVE-2026-0999 | 5.4 MEDIUM | Authentication bypass via userID login when email and username login are disabled |
| CVE-2025-14350 | 4.3 MEDIUM | Information disclosure via channel mentions in posts |
| CVE-2026-0997 | 4.3 MEDIUM | Mattermost Zoom Plugin channel preference API lacks authorization checks |
| CVE-2026-0998 | 4.3 MEDIUM | Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insu |
| CVE-2025-14573 | 3.8 LOW | Team Admin Bypass of Invite Permissions via allow_open_invite Field |
IV. Related Vulnerabilities
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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-200
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V. Comments for CVE-2025-13821
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