CVE-2021-41164

Medium

Elevated severity or exploit probability.

CVSS base

8.2 HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L

EPSS — probability of exploitation (30 days)

1.3%

70.1th percentile

CISA KEV

Not listed

Weakness / dates

CWE-79

Published 2021-11-17 · modified 2026-08-25

CVSS breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:L

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	L	Low
User Interaction	R	Required
Scope	C	Changed
Confidentiality	H	High
Integrity	L	Low
Availability	L	Low

Timeline

2021-11-17 — Published (NVD)
2026-08-25 — Last modified (NVD)

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.

Affected

ckeditor drupal fedoraproject oracle

References

Official: NVD · CVE.org