Vendor
CKEditor vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 10 vulnerabilities in CKEditor: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-28343, was published on 4 March 2026. 2 technologies have a page of their own.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About CKEditor
CKEditor is a web-based WYSIWYG rich text editor for content creation and editing in web applications.
CKEditor technologies
Latest CKEditor vulnerabilities
- CVE-2026-28343: CKEditor 5 cross-site scripting in HTML SupportlowCVSS 3.1EPSS 0.4%
- CVE-2025-58064: CKEditor 5 cross-site scripting in clipboard packagemediumCVSS 4EPSS 0.4%
- CVE-2025-25299: CKEditor 5 cross-site scripting in real-time collaborationmediumCVSS 4EPSS 0.6%
- CVE-2021-26271: CKEditor 4 regular expression denial of servicelowCVSS 3.1EPSS 2.0%
- CVE-2020-27193: CKEditor4 cross-site scripting in Color DialoglowCVSS 3.1EPSS 2.0%
- CVE-2021-26272: CKEditor 4 ReDoS in Autolink pluginlowCVSS 3.1EPSS 2.2%
- CVE-2021-33829: DRUPAL-CORE-2021-003 - **Update: 2021-06-11: Added identifier** Drupal core uses the third-party CKEditor library. This…lowCVSS 3.1EPSS 3.2%
- CVE-2020-9281: CKEditor 4 cross-site scripting in HTML Data ProcessorlowCVSS 3.1EPSS 4.3%
- CVE-2021-21391: CKEditor 5 ReDoS in multiple packageslowCVSS 3.1
- CVE-2018-11093: CKEditor ckeditor5-link cross-site scripting in link previewlowCVSS 3.1EPSS 1.0%
Most severe CKEditor vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2025-25299: CKEditor 5 cross-site scripting in real-time collaborationmediumCVSS 4EPSS 0.6%
- CVE-2025-58064: CKEditor 5 cross-site scripting in clipboard packagemediumCVSS 4EPSS 0.4%
- CVE-2020-9281: CKEditor 4 cross-site scripting in HTML Data ProcessorlowCVSS 3.1EPSS 4.3%
- CVE-2021-33829: DRUPAL-CORE-2021-003 - **Update: 2021-06-11: Added identifier** Drupal core uses the third-party CKEditor library. This…lowCVSS 3.1EPSS 3.2%
- CVE-2021-26272: CKEditor 4 ReDoS in Autolink pluginlowCVSS 3.1EPSS 2.2%
- CVE-2020-27193: CKEditor4 cross-site scripting in Color DialoglowCVSS 3.1EPSS 2.0%
- CVE-2021-26271: CKEditor 4 regular expression denial of servicelowCVSS 3.1EPSS 2.0%
- CVE-2018-11093: CKEditor ckeditor5-link cross-site scripting in link previewlowCVSS 3.1EPSS 1.0%
- CVE-2026-28343: CKEditor 5 cross-site scripting in HTML SupportlowCVSS 3.1EPSS 0.4%
- CVE-2021-21391: CKEditor 5 ReDoS in multiple packageslowCVSS 3.1
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/ckeditor.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "CKEditor vulnerabilities", https://junglewise.ai/threats/vendors/ckeditor, 26 September 2026.