CKEditor 5 cross-site scripting (XSS) vulnerability in the clipboard package

Description

A Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 clipboard package. This vulnerability could be triggered by a specific user action, leading to unauthorized JavaScript code execution, if the attacker managed to insert a malicious content into the editor, which might happen with a very specific editor configuration.

Recommendation

Update the @ckeditor/ckeditor5-clipboard package to the latest compatible version. Followings are version details:

• Affected version(s): **>= 46.0.0, < 46.0.3

  >= 44.2.0, < 45.2.2**

• Patched version(s): **46.0.3

  45.2.2**

References

• GHSA-x9gp-vjh6-3wv6
• CVE-2025-58064
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Regular Expression Denial of Service (ReDoS) in lodash (GHSA-29mw-wpgm-hmr9) - CVE-2020-28500
• Payload's SQLite adapter Session Fixation vulnerability (GHSA-26rv-h2hf-3fw4) - CVE-2025-4644
• http-proxy-middleware can call writeBody twice because "else if" is not used - CVE-2025-32996
• rejetto HFS vulnerable to OS Command Execution by remote authenticated users - CVE-2024-39943

Tags:

npm

@ckeditor/ckeditor5-clipboard