Bug 1974728 (CVE-2021-33829) - CVE-2021-33829 ckeditor: cross-site scripting allows remote attackers to inject executable JavaScript code
Summary: CVE-2021-33829 ckeditor: cross-site scripting allows remote attackers to inje...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-33829
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1974730 1974731
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-22 12:10 UTC by Marian Rehak
Modified: 2021-06-22 16:40 UTC (History)
2 users (show)

Fixed In Version: ckeditor 4.16.1
Clone Of:
Environment:
Last Closed: 2021-06-22 16:40:56 UTC
Embargoed:

Attachments (Terms of Use)

Description Marian Rehak 2021-06-22 12:10:12 UTC 
A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4.14.0 through 4.16.x before 4.16.1 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled.

Reference:

https://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parser
Comment 1 Marian Rehak 2021-06-22 12:11:14 UTC 
Created ckeditor tracking bugs for this issue:

Affects: epel-7 [bug 1974731]
Affects: fedora-all [bug 1974730]
Comment 2 Product Security DevOps Team 2021-06-22 16:40:56 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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