Incorrect sanitisation function leads to `XSS` in mermaid

Description

Malicious diagrams can contain javascript code that can be run at diagram readers machines.

Recommendation

Update the mermaid package to the latest compatible version. Followings are version details:

• Affected version(s): < 8.13.8
• Patched version(s): 8.13.8

References

• GHSA-p3rp-vmj9-gv6v
• CVE-2021-43861
• CWE-20
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Astro's bypass of image proxy domain validation leads to SSRF and potential XSS - CVE-2025-59837
• XSS in the `altField` option of the Datepicker widget in jquery-ui - CVE-2021-41182
• Webpack's AutoPublicPathRuntimeModule has a DOM Clobbering Gadget that leads to XSS - CVE-2024-43788
• Vega XSS via expression abusing vlSelectionTuples function array map calls in environments with satisfactory function ga - CVE-2025-65110

You might also like:

How to Secure your NodeJs Express Javascript Application - part 1

How do hackers hack websites?

CSRF, XXE, and 12 Other Security Acronyms Explained

Tags:

npm

mermaid