Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
File Upload vulnerability in ChestnutCMS through 1.5.0. Based on the code analysis, it was determined that the /api/member/avatar API endpoint receives a base64 string as input. This string is then passed to the memberService.uploadAvatarByBase64 method for processing. Within the service, the base64-encoded image is parsed. For example, given a string like: data:image/html;base64,PGh0bWw+PGltZyBzcmM9eCBvbmVycm9yPWFsZXJ0KDEpPjwvaHRtbD4= the content after the comma is extracted and decoded using Base64.getDecoder().decode(). The substring from the 11th character up to the first occurrence of a semicolon (;) is assigned to the suffix variable (representing the file extension). The decoded content is then written to a file. However, the file extension is not validated, and since this functionality is exposed to the frontend, it poses significant security risks.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
ChestnutCMS 安全漏洞
Vulnerability Description
ChestnutCMS是liweiyi个人开发者的一个前后端分离的企业级内容管理系统。 ChestnutCMS 1.5.0及之前版本存在安全漏洞，该漏洞源于文件上传功能中的/api/member/avatar接口对输入的base64字符串处理时未对文件扩展名进行验证，从而导致严重的安全风险。
CVSS Information
N/A
Vulnerability Type
N/A