How severe is CVE-2025-54880?

CVE-2025-54880 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-54880 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54880?

CVE-2025-54880 affects Mermaid Project Mermaid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54880?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54880 have an EU (EUVD) identifier?

Yes. CVE-2025-54880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25190.

When was CVE-2025-54880 published?

CVE-2025-54880 was published on 2025-08-19 and last updated on 2026-06-17.

CVE-2025-54880

CVE-2025-54880 is a medium-severity vulnerability in Mermaid Project Mermaid with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25190
Weakness: CWE-79
Affected product: Mermaid Project Mermaid
Published: 2025-08-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-54880?: 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.
How severe is CVE-2025-54880?: CVE-2025-54880 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-54880 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54880?: CVE-2025-54880 affects Mermaid Project Mermaid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54880?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54880 have an EU (EUVD) identifier?: Yes. CVE-2025-54880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25190.
When was CVE-2025-54880 published?: CVE-2025-54880 was published on 2025-08-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mermaid_project:mermaid:*:*:*:*:*:node.js:*:*

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