# CVE-2021-41165: ckeditor: CKEditor4 is an open source WYSIWYG HTML editor

CVE-2021-41165 is fixed in ckeditor on 1 platform by DEBIAN-CVE-2021-41165 (version 4.19.0+dfsg-1), released November 17, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-41165
- Priority: Routine
- CVSS: 5.4 (medium)
- EPSS: 0.0157
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 17, 2021

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ckeditor Debian 12.15 (bookworm) | 4.19.0+dfsg-1 | [DEBIAN-CVE-2021-41165](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41165.md) | Nov 17, 2021 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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