CKEditor 4 before 4.16 Vulnerability: ReDoS Attack via Crafted Text in Styles Input

CKEditor 4 before 4.16 Vulnerability: ReDoS Attack via Crafted Text in Styles Input

CVE-2021-26271 · MEDIUM Severity

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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).

Learn more about our Web Application Penetration Testing UK.