Debian Security Advisory

DLA-2813-1 ckeditor -- LTS security update

Date Reported:
09 Nov 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 992290.
In Mitre's CVE dictionary: CVE-2021-33829, CVE-2021-37695.
More information:

CKEditor, an open source WYSIWYG HTML editor with rich content support, which can be embedded into web pages, had two vulnerabilites as follows:

  • CVE-2021-33829

    A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled.

  • CVE-2021-37695

    A potential vulnerability has been discovered in CKEditor 4 Fake Objects package. The vulnerability allowed to inject malformed Fake Objects HTML, which could result in executing JavaScript code.

For Debian 9 stretch, these problems have been fixed in version 4.5.7+dfsg-2+deb9u1.

We recommend that you upgrade your ckeditor packages.

For the detailed security status of ckeditor please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: