Vulnerability · Published Jan 26, 2021 · Assigned by mitre
CVE-2021-26271
Medium 6.5
In plain English
A medium-severity security flaw in the ckeditor package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)2.0%top 19.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ckeditor | 4.16.0+dfsg-1 | DEBIAN-CVE-2021-26271 |
| npm | ckeditor4-dev | 4.16 | GHSA-jv4c-7jqq-m34x |
Affected products (as reported)
References
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 x_refsource_MISC
- https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
- https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first x_refsource_CONFIRM
- https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC