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I. Basic Information for CVE-2026-2457
Vulnerability Information

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Vulnerability Title
WebSocket Message Spoofing via Permalink Embed Manipulation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to sanitize client-supplied post metadata which allows an authenticated attacker to spoof permalink embeds impersonating other users via crafted PUT requests to the post update API endpoint.. Mattermost Advisory ID: MMSA-2025-00569
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
源验证错误
Source: NVD (National Vulnerability Database)
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 11.3.0及之前的11.3.x版本、11.2.2及之前的11.2.x版本和10.11.10及之前的10.11.x版本存在安全漏洞,该漏洞源于未能清理客户端提供的帖子元数据,可能导致经过身份验证的攻击者通过特制的PUT请求伪造永久链接嵌入并冒充其他用户。
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 11.3.0 ~ 11.3.0 -
II. Public POCs for CVE-2026-2457
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III. Intelligence Information for CVE-2026-2457
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IV. Related Vulnerabilities
V. Comments for CVE-2026-2457

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