CVE-2025-20033— DoS via custom post type for sysconsole plugin readers
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，该漏洞源于帖子类型验证不当，允许攻击者通过创建具有custom_pl_notification类型和特定属性的帖子来拒绝向部分用户提供服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-20033
Vulnerability Information
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Vulnerability Title
DoS via custom post type for sysconsole plugin readers
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1287
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，该漏洞源于帖子类型验证不当，允许攻击者通过创建具有custom_pl_notification类型和特定属性的帖子来拒绝向部分用户提供服务。
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 | 10.2.0 | - |
|
II. Public POCs for CVE-2025-20033
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2025-01-09 · 3 CVEs total
| CVE-2025-22449 | 3.8 LOW | Access control flaw for team admins allows unauthorized team additions |
| CVE-2025-22445 | 3.5 LOW | Misleading UI for undefined admin console settings in Calls causes security confusion |
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V. Comments for CVE-2025-20033
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