CVE-2021-32808

Name	CVE-2021-32808
Description	ckeditor is an open source WYSIWYG HTML editor with rich content support. A vulnerability has been discovered in the clipboard Widget plugin if used alongside the undo feature. The vulnerability allows a user to abuse undo functionality using malformed widget HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version >= 4.13.0. The problem has been recognized and patched. The fix will be available in version 4.16.2.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	992292

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ckeditor (PTS)	bullseye	4.16.0+dfsg-2	vulnerable
	bookworm	4.19.1+dfsg-1	fixed
	sid	4.22.1+dfsg1-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Debian Bugs
ckeditor	source	stretch	(not affected)
ckeditor	source	buster	(not affected)
ckeditor	source	(unstable)	4.16.2+dfsg-1	992292

Notes

[bullseye] - ckeditor <no-dsa> (Minor issue)
[buster] - ckeditor <not-affected> (Vulnerable code introduced later)
[stretch] - ckeditor <not-affected> (Vulnerable code introduced later)
https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-6226-h7ff-ch6c
https://github.com/ckeditor/ckeditor4/commit/0cb59313c834c94cec4c4d4c114b6ecb0270e21a (v4.16.2)
Introduced by https://github.com/ckeditor/ckeditor4/commit/72428a762271d5e54a609a7913356a6d309c895d (v4.13.0)