CVE-2021-41164
Advanced Content Filter (ACF) vulnerability allowing to execute JavaScript code using malformed HTML
8.2
HIGH
CVSS 3.1
EPSS 0.08%
Description
CKEditor4 is an open source WYSIWYG HTML editor. In affected versions a vulnerability has been discovered in the Advanced Content Filter (ACF) module and may affect all plugins used by CKEditor 4. 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. The problem has been recognized and patched. The fix will be available in version 4.17.0.
How to fix CVE-2021-41164
To remediate CVE-2021-41164, upgrade the affected package to a fixed version below.
- —upgrade to 8.9.20 or later
- —no fix listed
- —upgrade to 4.17.0 or later
Is CVE-2021-41164 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 8.9.0, < 8.9.20, >= 9.1.0, < 9.1.14, >= 9.2.0, < 9.2.9
- from 0
- from 0, < 4.17.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L |