CVE-2025-21083— Insufficient Input Validation on Post Props
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I. Basic Information for CVE-2025-21083
Vulnerability Information
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Vulnerability Title
Insufficient Input Validation on Post Props
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost Mobile Apps versions <=2.22.0 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1287
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Mobile Apps 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Mobile Apps是美国Mattermost公司的一款消息传递移动应用程序。 Mattermost Mobile Apps 2.22.0版本存在安全漏洞，该漏洞源于未能正确验证帖子属性，允许恶意经过身份验证的用户通过恶意帖子导致崩溃。
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 | 0 ~ 2.22.0 | - |
II. Public POCs for CVE-2025-21083
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2025-01-15 · 6 CVEs total
| CVE-2025-21088 | 6.5 MEDIUM | WebApp crash via improper validation of proto style in attachments |
| CVE-2025-20036 | 6.5 MEDIUM | Insufficient Input Validation on Post Props |
| CVE-2025-20086 | 6.5 MEDIUM | Insufficient Input Validation on Post Props |
| CVE-2025-20088 | 6.5 MEDIUM | Insufficient Input Validation on Post Props |
| CVE-2025-0476 | 4.3 MEDIUM | Mobile crash via file with specially crafted filename |
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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-1287
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V. Comments for CVE-2025-21083
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