Cross-Site Scripting in mermaid (GHSA-w32g-5hqp-gg6q)

Description

Versions of mermaid prior to 8.2.3 are vulnerable to Cross-Site Scripting. If malicious input such as A["<img src=invalid onerror=alert('XSS')></img>"] is provided to the application, it will execute the code instead of rendering it as text due to improper output encoding.

Recommendation

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

• Affected version(s): < 8.2.3
• Patched version(s): 8.2.3

References

• GHSA-w32g-5hqp-gg6q
• www.npmjs.com
• CWE-79
• OWASP 2021-A3

Related Issues

• Mermaid improperly sanitizes sequence diagram labels leading to XSS - CVE-2025-54881
• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 5 - CVE-2020-8203
• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 4 - CVE-2020-8203
• Prototype Pollution in lodash (GHSA-p6mc-m468-83gw) 3 - CVE-2020-8203

Tags:

npm

mermaid