CVE-2021-26272
MEDIUMCVSS 6.5/10EPSS 2.22%
Last modified
CVE-2021-26272 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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).. EPSS estimates a 2.22% chance of exploitation in the next 30 days.
Description
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).
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Ckeditor | Ckeditor | >= 4.0, < 4.16 |
| Oracle | Agile Plm | 9.3.5 |
| Oracle | Agile Plm | 9.3.6 |
| Oracle | Application Express | < 21.1.0 |
| Oracle | Banking Party Management | 2.7.0 |
| Oracle | Commerce Merchandising | >= 11.3.0, <= 11.3.2 |
| Oracle | Commerce Merchandising | 11.1.0 |
| Oracle | Commerce Merchandising | 11.2.0 |
| Oracle | Financial Services Analytical Applications Infrastructure | >= 8.0.6, <= 8.0.9 |
| Oracle | Financial Services Analytical Applications Infrastructure | 8.1.0 |
| Oracle | Financial Services Analytical Applications Infrastructure | 8.1.1 |
| Oracle | Financial Services Model Management And Governance | >= 8.0.8.0.0, <= 8.1.0.0.0 |
| Oracle | Jd Edwards Enterpriseone Tools | < 9.2.6.0 |
| Oracle | Siebel Ui Framework | <= 21.9 |
| Oracle | Webcenter Sites | 12.2.1.3.0 |
| Oracle | Webcenter Sites | 12.2.1.4.0 |
References
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416Release Notes, Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlNot Applicable, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416Release Notes, Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlNot Applicable, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26272?
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).
How severe is CVE-2021-26272?
CVE-2021-26272 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.22% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26272?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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