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CVE-2024-56828

Quick assessment

Affected
n/a n/a
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.

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。

AI Predicted 9.8 Difficulty: Easy EPSS 0.88% · P58

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2024-56828

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ChestnutCMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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。
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
- n/a n/a -

II. Public POCs for CVE-2024-56828

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III. Intelligence Information for CVE-2024-56828

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Proof of Concept for CVE-2024-56828 (1)

Other References for CVE-2024-56828 (2)

Same Patch Batch · n/a · 2025-01-06 · 25 CVEs total

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Showing top 20 of 25 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2024-56828

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