DescriptionIt was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs982587

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ckeditor (PTS)buster4.11.1+dfsg-1vulnerable
bookworm, sid4.19.1+dfsg-1fixed
ckeditor3 (PTS)buster3.6.6.1+dfsg-3fixed
bookworm, sid, bullseye3.6.6.1+dfsg-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ckeditor3source(unstable)(not affected)


[buster] - ckeditor <no-dsa> (Minor issue)
[stretch] - ckeditor <postponed> (Fix along next DLA)
- ckeditor3 <not-affected> (autolink plugin introduced in v4.5) (4.16.0)

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