# CKSource vulnerabilities

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

Junglewise Threat Intelligence has tracked 6 vulnerabilities in CKSource: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-116688, was published on 27 October 2026. 1 vulnerability in the last four weeks, level on the four before (1).

## Counts

- Last 7 days: 0
- Last 30 days: 1
- Last 90 days: 2
- All time: 6 (0 critical, 0 exploited in the wild)

## About CKSource

CKSource is a software company that develops web-based content editing and collaboration tools.

## Latest CKSource vulnerabilities

- [CVE-2026-116688: CKEditor 5 prototype pollution via es-toolkit in style processing](https://junglewise.ai/threats/cve-2026-116688-ckeditor-5-is-a-modern-javascript-rich-text-editor-with-an-mvc) (high, CVSS 8.1, published 27 Oct 2026)
- [Drupal cross-site scripting in CKEditor WYSIWYG](https://junglewise.ai/threats/drupal-core-2026-013-the-drupal-project-uses-the-ckeditor-https-github-f5b3da40) (info, published 16 Sep 2026)
- [CVE-2025-63830: CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a…](https://junglewise.ai/threats/cve-2025-63830-ckfinder-1-4-3-is-vulnerable-to-cross-site-scripting-xss-in-the) (medium, CVSS 6.1, published 14 Nov 2025)
- [CVE-2024-45613: CKEditor 5 clipboard cross-site scripting](https://junglewise.ai/threats/cve-2024-45613-ckeditor-5-clipboard-cross-site-scripting) (low, CVSS 3.1, published 25 Sep 2024)
- [CVE-2022-31175: CKEditor5 cross-site scripting in editor destroy process](https://junglewise.ai/threats/cve-2022-31175-ckeditor5-cross-site-scripting-in-editor-destroy-process) (low, CVSS 3.1, published 6 Aug 2022)
- [CVE-2021-21254: CKEditor 5 Markdown plugin regular expression denial of service](https://junglewise.ai/threats/cve-2021-21254-ckeditor-5-markdown-plugin-regular-expression-denial-of-service) (low, CVSS 3.1, published 29 Jan 2021)

## Most severe CKSource vulnerabilities

- [CVE-2026-116688: CKEditor 5 prototype pollution via es-toolkit in style processing](https://junglewise.ai/threats/cve-2026-116688-ckeditor-5-is-a-modern-javascript-rich-text-editor-with-an-mvc) (high, CVSS 8.1, published 27 Oct 2026)
- [CVE-2025-63830: CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a…](https://junglewise.ai/threats/cve-2025-63830-ckfinder-1-4-3-is-vulnerable-to-cross-site-scripting-xss-in-the) (medium, CVSS 6.1, published 14 Nov 2025)
- [CVE-2021-21254: CKEditor 5 Markdown plugin regular expression denial of service](https://junglewise.ai/threats/cve-2021-21254-ckeditor-5-markdown-plugin-regular-expression-denial-of-service) (low, CVSS 3.1, published 29 Jan 2021)
- [CVE-2022-31175: CKEditor5 cross-site scripting in editor destroy process](https://junglewise.ai/threats/cve-2022-31175-ckeditor5-cross-site-scripting-in-editor-destroy-process) (low, CVSS 3.1, published 6 Aug 2022)
- [CVE-2024-45613: CKEditor 5 clipboard cross-site scripting](https://junglewise.ai/threats/cve-2024-45613-ckeditor-5-clipboard-cross-site-scripting) (low, CVSS 3.1, published 25 Sep 2024)
- [Drupal cross-site scripting in CKEditor WYSIWYG](https://junglewise.ai/threats/drupal-core-2026-013-the-drupal-project-uses-the-ckeditor-https-github-f5b3da40) (info, published 16 Sep 2026)

## Vulnerabilities per week

1 vulnerability in the last four weeks, level on the four before (1).

| 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 | 1 | 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 | 1 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## 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, "CKSource vulnerabilities", https://junglewise.ai/threats/vendors/cksource, 9 November 2026.