CVE-2021-43861— Incorrect sanitisation function leads to `XSS`
Quick assessment
Affected
mermaid-js mermaid
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.
Mermaid是一个应用软件。使用文本和代码创建图表和可视化。 Mermaid 8.13.8之前版本存在安全漏洞，攻击者可利用该漏洞通过恶意图表在阅读图表的机器上运行javascript代码。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-43861
Vulnerability Information
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Vulnerability Title
Incorrect sanitisation function leads to `XSS`
Source: CVE Program / CVE List V5
Vulnerability Description
Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. Prior to version 8.13.8, malicious diagrams can run javascript code at diagram readers' machines. Users should upgrade to version 8.13.8 to receive a patch. There are no known workarounds aside from upgrading.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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
Mermaid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mermaid是一个应用软件。使用文本和代码创建图表和可视化。 Mermaid 8.13.8之前版本存在安全漏洞，攻击者可利用该漏洞通过恶意图表在阅读图表的机器上运行javascript代码。
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 |
|---|---|---|---|---|
| mermaid-js | mermaid | < 8.13.8 | - |
|
II. Public POCs for CVE-2021-43861
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-43861 (1)
Vendor Advisories for CVE-2021-43861 (1)
-
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6v x_refsource_CONFIRM
Other References for CVE-2021-43861 (1)
-
https://github.com/mermaid-js/mermaid/releases/tag/8.13.8 x_refsource_MISC
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Same weakness: CWE-79
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V. Comments for CVE-2021-43861
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