How severe is CVE-2025-54881?

CVE-2025-54881 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2025-54881 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54881?

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

Does CVE-2025-54881 have an EU (EUVD) identifier?

Yes. CVE-2025-54881 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28574.

When was CVE-2025-54881 published?

CVE-2025-54881 was published on 2025-08-19 and last updated on 2026-06-17.

CVE-2025-54881

CVE-2025-54881 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.3. 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 4.0 base score 5.3)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28574
Weakness: CWE-79
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 10.9.0-rc.1 to 11.9.0, user supplied input for sequence diagram labels is passed to innerHTML during calculation of element size, causing XSS.

Frequently asked questions

What is CVE-2025-54881?: 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 10.9.0-rc.1 to 11.9.0, user supplied input for sequence diagram labels is passed to innerHTML during calculation of element size, causing XSS.
How severe is CVE-2025-54881?: CVE-2025-54881 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2025-54881 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-54881?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54881 have an EU (EUVD) identifier?: Yes. CVE-2025-54881 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28574.
When was CVE-2025-54881 published?: CVE-2025-54881 was published on 2025-08-19 and last updated on 2026-06-17.

References

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CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

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