Inclusion of Functionality from Untrusted Control Sphere The advisory has been revoked - it doesn't affect any version of package ckeditor (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-CKEDITOR-1065785
- published28 Jan 2021
- disclosed26 Jan 2021
Introduced: 26 Jan 2021
CVE-2021-26271 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ckeditor package and not the ckeditor package as distributed by Ubuntu.
It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs plugin).
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-26271
- 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/blob/major/CHANGES.md#ckeditor-416
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com//security-alerts/cpujul2021.html