CVE-2025-14822— DoS from quadratic complexity in model.ParseHashtags
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 10.11.8及之前的10.11.x版本存在安全漏洞，该漏洞源于处理主题标签前未验证输入大小，可能导致经过身份验证的攻击者通过单个HTTP请求耗尽CPU资源。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-14822
Vulnerability Information
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Vulnerability Title
DoS from quadratic complexity in model.ParseHashtags
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
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 10.11.8及之前的10.11.x版本存在安全漏洞，该漏洞源于处理主题标签前未验证输入大小，可能导致经过身份验证的攻击者通过单个HTTP请求耗尽CPU资源。
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 ~ 10.11.8 | - |
|
II. Public POCs for CVE-2025-14822
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2025-14822
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