CVE-2025-54880— Mermaid does not properly sanitize architecture diagram iconText leading 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mermaid-js开源的一个应用软件。使用文本和代码创建图表和可视化。 Mermaid 11.9.0及之前版本存在安全漏洞，该漏洞源于用户输入的架构图图标传递给d3 html方法，可能导致跨站脚本。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-54880
Vulnerability Information
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Vulnerability Title
Mermaid does not properly sanitize architecture diagram iconText leading 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. In the default configuration of mermaid 11.9.0 and earlier, user supplied input for architecture diagram icons is passed to the d3 html() method, creating a sink for cross site scripting. This vulnerability is fixed in 11.10.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
Mermaid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mermaid是mermaid-js开源的一个应用软件。使用文本和代码创建图表和可视化。 Mermaid 11.9.0及之前版本存在安全漏洞，该漏洞源于用户输入的架构图图标传递给d3 html方法，可能导致跨站脚本。
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 |
|---|---|---|---|---|
| mermaid-js | mermaid | >= 11.1.0, < 11.10.0 | - |
|
II. Public POCs for CVE-2025-54880
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: mermaid
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CVE-2026-71439
Mermaid radar diagrams are vulnerable to DoS -
CVE-2026-71438
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Mermaid Architecture diagrams are vulnerable to prototype po -
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Mermaid XY Charts are vulnerable to an infinite loop DoS
Same vendor: mermaid-js
-
CVE-2026-71439
Mermaid radar diagrams are vulnerable to DoS -
CVE-2026-71438
Mermaid configuration APIs allow prototype pollution -
CVE-2026-50159
Mermaid allows CSS injection applying to sibling elements of -
CVE-2026-71437
Mermaid Architecture diagrams are vulnerable to prototype po -
CVE-2026-71436
Mermaid XY Charts are vulnerable to an infinite loop DoS
Same weakness: CWE-79
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V. Comments for CVE-2025-54880
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