HighGHSA-m94c-37g6-cjhcCVE-2021-37695

Fake objects feature vulnerability allowing to execute JavaScript code using malformed HTML.

Published 23 Aug 2021 · Updated 8 Jul 2026

Affected package

Affected: <4.16.2
Fixed in: 4.16.2

Update to the fixed version for your release line, for example:npm install ckeditor4@4.16.2

Details

Affected packages

The vulnerability has been discovered in Fake Objects plugin. All plugins with Fake Objects plugin dependency are affected:

Impact

A potential vulnerability has been discovered in CKEditor 4 Fake Objects package. The vulnerability allowed to inject malformed Fake Objects HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version < 4.16.2.

Patches

The problem has been recognized and patched. The fix will be available in version 4.16.2.

For more information

Email us at security@cksource.com if you have any questions or comments about this advisory.

Acknowledgements

The CKEditor 4 team would like to thank Mika Kulmala (kulmik) for recognizing and reporting this vulnerability.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.