CVE-2021-35513

Name: CVE-2021-35513
Creator: NVD / NIST
Published: 2021-06-27T12:15:08.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2021-35513 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Mermaid before 8.11.0 allows XSS when the antiscript feature is used.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

Mermaid before 8.11.0 allows XSS when the antiscript feature is used.

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

EPSS Probability

1.02%

58.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mermaid Project	Mermaid	< 8.11.0

References

https://github.com/mermaid-js/mermaid/issues/2122Third Party Advisory
https://github.com/mermaid-js/mermaid/pull/2123Patch, Third Party Advisory
https://github.com/mermaid-js/mermaid/releases/tag/8.11.0-rc2Release Notes, Third Party Advisory
https://github.com/mermaid-js/mermaid/issues/2122Third Party Advisory
https://github.com/mermaid-js/mermaid/pull/2123Patch, Third Party Advisory
https://github.com/mermaid-js/mermaid/releases/tag/8.11.0-rc2Release Notes, Third Party Advisory

Timeline

Published: Jun 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35513?

Mermaid before 8.11.0 allows XSS when the antiscript feature is used.

How severe is CVE-2021-35513?

CVE-2021-35513 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35513?

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-2021-35513?

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

Scan your code now

Source: NVD / NIST