RubySec

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CVE-2021-41164 (ckeditor): Advanced Content Filter (ACF) vulnerability allowing to execute JavaScript code using malformed HTML

ADVISORIES

GEM

ckeditor

SEVERITY

CVSS v3.x: 8.2 (High)

PATCHED VERSIONS

  • >= 5.1.2

DESCRIPTION

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) for recognizing and reporting this vulnerability.

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