ADVISORIES

• CVE-2021-32809 (NVD)
• GHSA-7889-rm5j-hpgg
• Vendor Advisory

GEM

ckeditor

SEVERITY

CVSS v3.x: 4.6 (Medium)

UNAFFECTED VERSIONS

• < 4.1.2

PATCHED VERSIONS

• >= 5.1.2

DESCRIPTION

Affected packages

The vulnerability has been discovered in clipboard plugin. All plugins with clipboard plugin dependency are affected:

• clipboard
• pastetext
• pastetools
• widget
• uploadwidget
• autolink
• tableselection

Impact

A potential vulnerability has been discovered in CKEditor 4 Clipboard package. The vulnerability allowed to abuse paste functionality using malformed HTML, which could result in injecting arbitrary HTML into the editor. It affects all users using the CKEditor 4 plugins listed above at version >= 4.5.2.

Patches

The problem has been recognized and patched. The fix will be available in version 4.16.2.

For more information

Email us at security@cksource.com if you have any questions or comments about this advisory.

Acknowledgements

The CKEditor 4 team would like to thank Anton Subbotin (skavans) for recognizing and reporting this vulnerability.

RELATED

• https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-7889-rm5j-hpgg
• https://nvd.nist.gov/vuln/detail/CVE-2021-32809
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/
• https://www.oracle.com/security-alerts/cpuoct2021.html
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://github.com/advisories/GHSA-7889-rm5j-hpgg