Cross-Site Scripting in diagram-js

Description

Versions of diagram-js prior to 3.3.1 (for 3.x) and 2.6.2 (for 2.x) are vulnerable to Cross-Site Scripting. The package fails to escape output of user-controlled input in search-pad, allowing attackers to execute arbitrary JavaScript.

Recommendation

Update the diagram-js package to the latest compatible version. Followings are version details:

• Affected version(s): **>= 3.0.0, < 3.3.1

  < 2.6.2**

• Patched version(s): **3.3.1

  2.6.2**

References

• GHSA-8fw4-xh83-3j6q
• bpmn.io
• CWE-79
• OWASP 2021-A3

Related Issues

• Cross-Site Scripting in buefy - Vulnerability
• html2pdf.js contains a cross-site scripting vulnerability - CVE-2026-22787
• CKEditor 5 cross-site scripting (XSS) vulnerability in the clipboard package - CVE-2025-58064
• QMarkdown Cross-Site Scripting (XSS) vulnerability - CVE-2025-43954

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Tags:

npm

diagram-js