CVE-2025-54880

Name: CVE-2025-54880
Creator: NVD / NIST
Published: 2025-08-19T17:15:41.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2025-54880 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

5.1/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.34%

26.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mermaid Project	Mermaid	>= 11.1.0, < 11.10.0

References

https://github.com/mermaid-js/mermaid/commit/2aa83302795183ea5c65caec3da1edd6cb4791fcPatch
https://github.com/mermaid-js/mermaid/commit/734bde38777c9190a5a72e96421c83424442d4e4Product
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-8gwm-58g9-j8pwExploit, Patch, Vendor Advisory
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-8gwm-58g9-j8pwExploit, Patch, Vendor Advisory

Timeline

Published: Aug 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-54880?

How severe is CVE-2025-54880?

CVE-2025-54880 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2025-54880?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-54880?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST