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I. Basic Information for CVE-2026-34213
Vulnerability Information

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Vulnerability Title
Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.
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:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
Docmost 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Docmost是Docmost开源的一个开协作维基和文档软件。 Docmost 0.3.0至0.71.0之前版本存在安全漏洞,该漏洞源于授权不当,可能导致低权限认证用户通过提供受害者attachmentId来覆盖同一工作空间中其他页面的附件。
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
docmostdocmost >= 0.3.0, < 0.71.0 -
II. Public POCs for CVE-2026-34213
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III. Intelligence Information for CVE-2026-34213
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