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I. Basic Information for CVE-2025-27936
Vulnerability Information

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Vulnerability Title
Webhook Secret Exposure via Timing attack in MSteams plugin
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过时间差异性导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Plugin MSTeams 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Plugin MSTeams是美国Mattermost公司的一个Mattermost插件。 Mattermost Plugin MSTeams 2.1.0之前版本存在安全漏洞,该漏洞源于webhook密钥比较未使用恒定时间算法,可能导致密钥泄露。
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 10.5.0 ~ 10.5.1 -
II. Public POCs for CVE-2025-27936
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III. Intelligence Information for CVE-2025-27936
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