# CVE-2020-9281: ckeditor: A cross-site scripting (XSS) vulnerability in the HTML Data Processor for CKEditor 4.0 before 4.14 allows remote atta...

CVE-2020-9281 is fixed in ckeditor on 1 platform, first by ckeditor 4.5.7+dfsg-2ubuntu0.18.04.1, released August 12, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-9281
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0431
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2020

## Description

A cross-site scripting (XSS) vulnerability in the HTML Data Processor for CKEditor 4.0 before 4.14 allows remote attackers to inject arbitrary web script through a crafted "protected" comment (with the cke_protected syntax).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ckeditor Ubuntu 18.04.6 LTS (bionic) | 4.5.7+dfsg-2ubuntu0.18.04.1 | [ckeditor 4.5.7+dfsg-2ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ckeditor-4.5.7-dfsg-2ubuntu0.18.04.1.md) | Aug 12, 2021 |
| Linux | ckeditor Ubuntu 20.04 LTS (focal) | 4.12.1+dfsg-1ubuntu0.1 | [ckeditor 4.12.1+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ckeditor-4.12.1-dfsg-1ubuntu0.1.md) | Aug 12, 2021 |

---

Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.