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CVE-2021-26628— MaxBoard XSS and File Upload Vulnerability

Quick assessment

Affected
No Vendor Information MaxBoard
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.

Max Yi MaxBoard是韩国Max Yi公司的一个 CMS（内容管理系统） 或 Web 框架。有助于使网站创建和站点管理更容易，并且可以轻松方便地用于构建应用程序的后端。 MaxBoard 1.9.6之前版本存在跨站脚本漏洞，该漏洞源于管理页面的脚本验证不足和上传文件验证不足。未经授权的用户上传伪造成图像文件的任意文件利用该漏洞可以窃取管理员权限。

CVSS 8.1 · High EPSS 0.77% · P53
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I. Basic Information for CVE-2021-26628

Vulnerability Information
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Vulnerability Title
MaxBoard XSS and File Upload Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Insufficient script validation of the admin page enables XSS, which causes unauthorized users to steal admin privileges. When uploading file in a specific menu, the verification of the files is insufficient. It allows remote attackers to upload arbitrary files disguising them as image files.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
MaxBoard 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Max Yi MaxBoard是韩国Max Yi公司的一个 CMS（内容管理系统） 或 Web 框架。有助于使网站创建和站点管理更容易，并且可以轻松方便地用于构建应用程序的后端。 MaxBoard 1.9.6之前版本存在跨站脚本漏洞，该漏洞源于管理页面的脚本验证不足和上传文件验证不足。未经授权的用户上传伪造成图像文件的任意文件利用该漏洞可以窃取管理员权限。
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
No Vendor Information MaxBoard unspecified ~ 1.9.6 -

II. Public POCs for CVE-2021-26628

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III. Intelligence Information for CVE-2021-26628

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IV. Related Vulnerabilities

Same product: MaxBoard
Same weakness: CWE-79

V. Comments for CVE-2021-26628

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