CVE-2021-26271

medium

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).

References

https://www.oracle.com/security-alerts/cpuoct2021.html

https://www.oracle.com//security-alerts/cpujul2021.html

https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416

https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first

Details

Source: Mitre, NVD

Published: 2021-01-26

Updated: 2021-12-01

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H