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CVE-2021-47836— Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting

Quick assessment

Affected
jersou Markdown Explorer
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.

Markdown Explorer是jersou个人开发者的一个Markdown文档浏览器。 Markdown Explorer 0.1.1版本存在安全漏洞，该漏洞源于文件上传和编辑器输入存在跨站脚本，可能导致远程代码执行。

CVSS 6.1 · Medium EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
jersou Markdown Explorer 0.1.1 affected
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I. Basic Information for CVE-2021-47836

Vulnerability Information
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Vulnerability Title
Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting
Source: CVE Program / CVE List V5
Vulnerability Description
Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads that execute in the application's privileged renderer context, allowing code execution on the host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Markdown Explorer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Markdown Explorer是jersou个人开发者的一个Markdown文档浏览器。 Markdown Explorer 0.1.1版本存在安全漏洞，该漏洞源于文件上传和编辑器输入存在跨站脚本，可能导致远程代码执行。
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
jersou Markdown Explorer 0.1.1 -

II. Public POCs for CVE-2021-47836

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-47836

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Exploits & Public PoCs for CVE-2021-47836 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2021-47836

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