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HIGH8.2

GHSA-pvmx-g8h5-cprj

Advanced Content Filter (ACF) vulnerability allowing to execute JavaScript code using malformed HTML

Quick fix

GHSA-pvmx-g8h5-cprj — ckeditor4: upgrade to the fixed version with the command below.

npm install ckeditor4@4.17.0

Details

### Affected packages The vulnerability has been discovered in the Advanced Content Filter (ACF) module and may affect all plugins used by CKEditor 4.

### Impact A potential vulnerability has been discovered in CKEditor 4 Advanced Content Filter (ACF) core module. The vulnerability allowed to inject malformed HTML bypassing content sanitization, which could result in executing JavaScript code. It affects all users using the CKEditor 4 at version < 4.17.0.

### Patches The problem has been recognized and patched. The fix will be available in version 4.17.0.

### 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 Maurice Dauer ([laytonctf](https://twitter.com/laytonctf)) for recognizing and reporting this vulnerability.

Are you affected?

Enter the version of the package you're using.

Affected packages

npm/ckeditor4
Introduced in: 0Fixed in: 4.17.0
Fixnpm install ckeditor4@4.17.0

References