CVE-2025-52931— Unexpected input to Update Channel Subscription endpoint causes DoS in Mattermost Confluence Plugin
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I. Basic Information for CVE-2025-52931
Vulnerability Information
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Vulnerability Title
Unexpected input to Update Channel Subscription endpoint causes DoS in Mattermost Confluence Plugin
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to update channel subscription endpoint with an invalid request body.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对因果或异常条件的不恰当检查
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Confluence Plugin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Confluence Plugin是美国Mattermost公司的一个插件。 Mattermost Confluence Plugin 1.5.0之前版本存在安全漏洞，该漏洞源于未处理意外请求体，可能导致插件崩溃。
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 Confluence Plugin | 0 ~ 1.5.0 | - |
II. Public POCs for CVE-2025-52931
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mattermost · 2025-08-11 · 13 CVEs total
| CVE-2025-54525 | 7.5 HIGH | Unexpected input to Create Channel Subscription endpoint causes DoS in Mattermost Confluen |
| CVE-2025-44004 | 7.2 HIGH | Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin |
| CVE-2025-54478 | 7.2 HIGH | Unauthenticated Channel Subscription Edit in Mattermost Confluence Plugin |
| CVE-2025-48731 | 6.4 MEDIUM | Unauthorized Subscription Edit to Confluence Space in Mattermost Confluence Plugin |
| CVE-2025-53514 | 5.9 MEDIUM | Unexpected Input to Server Webhook endpoint Causes DoS in Mattermost Confluence Plugin |
| CVE-2025-54463 | 5.9 MEDIUM | Unexpected Input to Cloud Webhook endpoint Causes DoS in Mattermost Confluence Plugin |
| CVE-2025-54458 | 5.0 MEDIUM | Unauthorized Subscription Creation to Confluence Space in Mattermost Confluence Plugin |
| CVE-2025-44001 | 4.0 MEDIUM | Unauthorized Channel Subscription Read in Mattermost Confluence Plugin |
| CVE-2025-53910 | 4.0 MEDIUM | Unauthorized Channel Subscription Edit in Mattermost Confluence Plugin |
| CVE-2025-8285 | 4.0 MEDIUM | Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin |
| CVE-2025-49221 | 3.7 LOW | Unauthenticated Access to Channel Subscription in Mattermost Confluence Plugin |
| CVE-2025-53857 | 3.7 LOW | Lack of Authorization on Get Channel Subscriptions for Autocomplete in Mattermost Confluen |
IV. Related Vulnerabilities
Same product: Mattermost Confluence Plugin
- CVE-2025-13523
Cross-Site Scripting (XSS) via Unescaped Display Names in Ma - CVE-2025-8285
Unauthorized Channel Subscription Creation in Mattermost Con - CVE-2025-54525
Unexpected input to Create Channel Subscription endpoint cau - CVE-2025-54478
Unauthenticated Channel Subscription Edit in Mattermost Conf - CVE-2025-54458
Unauthorized Subscription Creation to Confluence Space in Ma
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-754
- CVE-2026-41662
Admidio: Missing Minimum Administrator Check in Role Members - CVE-2026-35225
Improper timeout handling in CODESYS EtherNetIP - CVE-2026-35366
uutils coreutils printenv Security Inspection Bypass via UTF - CVE-2026-40343
free5GC UDR: Fail-open handling in PolicyDataSubsToNotifyPos - CVE-2026-40249
free5gc UDR fail-open request handling in PolicyDataSubsToNo
V. Comments for CVE-2025-52931
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