Bug 1921304 (CVE-2021-26271) - CVE-2021-26271 ckeditor: Regular expression denial of service via crafted text into the Styles input
Summary: CVE-2021-26271 ckeditor: Regular expression denial of service via crafted tex...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-26271
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-01-27 20:59 UTC by Pedro Sampaio
Modified: 2021-10-28 05:29 UTC (History)
0 users

Fixed In Version: ckeditor 4.16
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Environment:
Last Closed: 2021-10-28 05:29:02 UTC


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Description Pedro Sampaio 2021-01-27 20:59:47 UTC
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).

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


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