CVE-2021-41165

Description

CKEditor4 is an open source WYSIWYG HTML editor. In affected version a vulnerability has been discovered in the core HTML processing module and may affect all plugins used by CKEditor 4. The vulnerability allowed to inject malformed comments HTML bypassing content sanitization, which could result in executing JavaScript code. It affects all users using the CKEditor 4 at version < 4.17.0. The problem has been recognized and patched. The fix will be available in version 4.17.0.

How to fix CVE-2021-41165

To remediate CVE-2021-41165, upgrade the affected package to a fixed version below.

• —upgrade to 8.9.20 or later
• —no fix listed
• —no fix listed
• —upgrade to 4.17.0 or later
• —upgrade to 4.17.0 or later

Is CVE-2021-41165 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (5)

• >= 8.9.0, < 8.9.20, >= 9.1.0, < 9.1.14, >= 9.2.0, < 9.2.9
• from 0
• from 0
• from 0, < 4.17.0
• from 0, < 4.17.0

CVSS scores

References (9)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-41165
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-41165
• PATCHgithub.com/ckeditor/ckeditor4
• WEBgithub.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-417