Inclusion of Functionality from Untrusted Control Sphere in CKEditor 4
It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | ckeditor4 | < 4.16.0 | 4.16.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-26272
- https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first
- https://github.com/ckeditor/ckeditor4
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-829- Platform
- npm
- Package
ckeditor4- Disclosed
- 13.10.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wpvm-wqr4-p7cw - CC BY 4.0
Vulnerability history: ckeditor4
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 15
- First → latest
- 05.2021 08.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 11
Disclosures per year
- 2021: 8
- 2022: 2
- 2023: 0
- 2024: 5
- 2025: 0
- 2026: 0
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Inclusion of Functionality from Untrusted Control Sphere in CKEditor 4 this entry
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