CVE-2021-47837— Markdownify 1.2.0 - Persistent Cross-Site Scripting
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2021-47837
Vulnerability Information
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Vulnerability Title
Markdownify 1.2.0 - Persistent Cross-Site Scripting
Source: NVD (National Vulnerability Database)
Vulnerability Description
Markdownify 1.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload crafted markdown files with embedded scripts that execute when the file is opened, potentially enabling remote code execution.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Markdownify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Markdownify是Amit Merchant个人开发者的一个基于 Electron 构建的最小 Markdown Editor 桌面应用程序。 Markdownify 1.2.0版本存在安全漏洞，该漏洞源于markdown文件存在存储型跨站脚本，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 |
|---|---|---|---|---|
| amitmerchant1990 | Markdownify | 1.2.0 | - |
II. Public POCs for CVE-2021-47837
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 4612 chars
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III. Intelligence Information for CVE-2021-47837
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IV. Related Vulnerabilities
Same weakness: CWE-79
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WordPress Advanced Custom Fields: Font Awesome Field plugin - CVE-2026-49102
Webmin <2.640 XSS漏洞 - CVE-2026-47119
Agent Zero < 1.15 Stored XSS via image_get API Endpoint - CVE-2025-3633
IBM Cognos Analytics is affected by multiple security vulner - CVE-2026-42750
WordPress WPComplete plugin <= 2.9.5.4 - Cross Site Scriptin
V. Comments for CVE-2021-47837
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