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CVE-2021-23639— Remote Code Execution (RCE)

Quick assessment

Affected
n/a md-to-pdf
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Markdown To Pdf是德国Simon Hanisch个人开发者的一个简单且可破解的 Cli 工具。用于将 Markdown 转换为 pdf。 Markdown To Pdf 中存在输入验证错误漏洞，该漏洞源于产品在没有禁用JS引擎时使用gray-matter解析前端内容。攻击者可通过该漏洞执行远程代码执行。以下产品及版本受到影响：Simonhaenisch md-to-pdf 5.0.0 之前版本。

CVSS 9.8 · Critical EPSS 5.33% · P92

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-23639

Vulnerability Information
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Vulnerability Title
Remote Code Execution (RCE)
Source: CVE Program / CVE List V5
Vulnerability Description
The package md-to-pdf before 5.0.0 are vulnerable to Remote Code Execution (RCE) due to utilizing the library gray-matter to parse front matter content, without disabling the JS engine.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Markdown To Pdf 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Markdown To Pdf是德国Simon Hanisch个人开发者的一个简单且可破解的 Cli 工具。用于将 Markdown 转换为 pdf。 Markdown To Pdf 中存在输入验证错误漏洞，该漏洞源于产品在没有禁用JS引擎时使用gray-matter解析前端内容。攻击者可通过该漏洞执行远程代码执行。以下产品及版本受到影响：Simonhaenisch md-to-pdf 5.0.0 之前版本。
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
- md-to-pdf unspecified ~ 5.0.0 -

II. Public POCs for CVE-2021-23639

# POC Description Source Link Shenlong Link
1 Exploit of CVE-2021-23639 for the vulnerable library 'md-to-pdf' in JS https://github.com/MohandAcherir/CVE-2021-23639 POC Details
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III. Intelligence Information for CVE-2021-23639

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Patches & Fixes for CVE-2021-23639 (1)

Vendor Advisories for CVE-2021-23639 (1)

Other References for CVE-2021-23639 (1)

Same Patch Batch · n/a · 2021-12-10 · 17 CVEs total

CVE-2021-23463 8.1 HIGH XML External Entity (XXE) Injection
CVE-2021-23663 6.5 MEDIUM Prototype Pollution
CVE-2021-23700 6.5 MEDIUM Prototype Pollution
CVE-2021-23561 6.5 MEDIUM Prototype Pollution
CVE-2021-27984 Pluck 代码问题漏洞
CVE-2021-27983 MaxSite CMS 输入验证错误漏洞
CVE-2021-31747 Pluck 信任管理问题漏洞
CVE-2021-31746 Pluck 路径遍历漏洞
CVE-2021-31745 Pluck 授权问题漏洞
CVE-2021-29214 HPE StoreServ Management Console和Manage 代码注入漏洞
CVE-2021-37934 Huntflow Enterprise 权限许可和访问控制问题漏洞
CVE-2021-37935 Huntflow Enterprise 信息泄露漏洞
CVE-2021-37189 Digi TransPort 安全漏洞
CVE-2021-37188 Digi International Digi TransPort 数据伪造问题漏洞
CVE-2021-37187 Digi International Digi TransPort 安全漏洞
CVE-2021-35978 Digi TransPort DR64 命令注入漏洞

IV. Related Vulnerabilities

Same product: md-to-pdf
Same vendor: n/a

V. Comments for CVE-2021-23639

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