CVE-2021-32809 – ckeditor4

Package

Manager: npm
Name: ckeditor4
Vulnerable Version: >=4.5.2 <4.16.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00207 pctl0.43093

Details

Clipboard feature vulnerability allowing to inject arbitrary HTML into the editor using paste functionality ### Affected packages The vulnerability has been discovered in [clipboard](https://ckeditor.com/cke4/addon/clipboard) plugin. All plugins with [clipboard](https://ckeditor.com/cke4/addon/clipboard) plugin dependency are affected: * [clipboard](https://ckeditor.com/cke4/addon/clipboard) * [pastetext](https://ckeditor.com/cke4/addon/pastetext) * [pastetools](https://ckeditor.com/cke4/addon/pastetools) * [widget](https://ckeditor.com/cke4/addon/widget) * [uploadwidget](https://ckeditor.com/cke4/addon/uploadwidget) * [autolink](https://ckeditor.com/cke4/addon/autolink) * [tableselection](https://ckeditor.com/cke4/addon/tableselection) ### Impact A potential vulnerability has been discovered in CKEditor 4 [Clipboard](https://ckeditor.com/cke4/addon/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](https://github.com/skavans)) for recognizing and reporting this vulnerability.

Metadata

Created: 2021-08-23T19:40:57Z
Modified: 2022-02-08T21:01:48Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-7889-rm5j-hpgg/GHSA-7889-rm5j-hpgg.json
CWE IDs: ["CWE-79", "CWE-94"]
Alternative ID: GHSA-7889-rm5j-hpgg
Finding: F188
Auto approve: 1