# CKEditor 5 vulnerabilities

Source: https://junglewise.ai/threats/technologies/ckeditor-5  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/ckeditor-5.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in CKEditor 5: 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.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (0 critical, 0 exploited in the wild)

## About CKEditor 5

Open-source rich text editor for web applications with modular architecture and real-time collaboration support.

## Latest CKEditor 5 vulnerabilities

- [CVE-2026-28343: CKEditor 5 cross-site scripting in HTML Support](https://junglewise.ai/threats/cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support) (low, CVSS 3.1, published 4 Mar 2026)
- [CVE-2025-58064: CKEditor 5 cross-site scripting in clipboard package](https://junglewise.ai/threats/cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package) (medium, CVSS 4, published 3 Sep 2025)
- [CVE-2025-25299: CKEditor 5 cross-site scripting in real-time collaboration](https://junglewise.ai/threats/cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration) (medium, CVSS 4, published 20 Feb 2025)

## Most severe CKEditor 5 vulnerabilities

- [CVE-2025-25299: CKEditor 5 cross-site scripting in real-time collaboration](https://junglewise.ai/threats/cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration) (medium, CVSS 4, published 20 Feb 2025)
- [CVE-2025-58064: CKEditor 5 cross-site scripting in clipboard package](https://junglewise.ai/threats/cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package) (medium, CVSS 4, published 3 Sep 2025)
- [CVE-2026-28343: CKEditor 5 cross-site scripting in HTML Support](https://junglewise.ai/threats/cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support) (low, CVSS 3.1, published 4 Mar 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other CKEditor technologies

- [CKEditor 4](https://junglewise.ai/threats/technologies/ckeditor-4): 5 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "CKEditor 5 vulnerabilities", https://junglewise.ai/threats/technologies/ckeditor-5, 9 November 2026.