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I. Basic Information for CVE-2025-21088
Vulnerability Information

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Vulnerability Title
WebApp crash via improper validation of proto style in attachments
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 10.2.x <= 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 the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.
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
不正确的类型转换
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost 代码问题漏洞
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存在代码问题漏洞,该漏洞源于未能正确验证提供给操作样式的proto样式,允许攻击者通过精心设计的恶意输入使前端崩溃。
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
VendorProductAffected VersionsCPESubscribe
MattermostMattermost 10.2.0 -
II. Public POCs for CVE-2025-21088
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III. Intelligence Information for CVE-2025-21088
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21088

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