CVE-2022-31175: Cross-site scripting caused by the editor instance destroying process in ckeditor5
First published: Wed Aug 03 2022(Updated: )
CKEditor 5 is a JavaScript rich text editor. A cross-site scripting vulnerability has been discovered affecting three optional CKEditor 5's packages in versions prior to 35.0.1. The vulnerability allowed to trigger a JavaScript code after fulfilling special conditions. The affected packages are `@ckeditor/ckeditor5-markdown-gfm`, `@ckeditor/ckeditor5-html-support`, and `@ckeditor/ckeditor5-html-embed`. The specific conditions are 1) Using one of the affected packages. In case of `ckeditor5-html-support` and `ckeditor5-html-embed`, additionally, it was required to use a configuration that allows unsafe markup inside the editor. 2) Destroying the editor instance and 3) Initializing the editor on an element and using an element other than `<textarea>` as a base. The root cause of the issue was a mechanism responsible for updating the source element with the markup coming from the CKEditor 5 data pipeline after destroying the editor. This vulnerability might affect a small percent of integrators that depend on dynamic editor initialization/destroy and use Markdown, General HTML Support or HTML embed features. The problem has been recognized and patched. The fix is available in version 35.0.1. There are no known workarounds for this issue.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ckeditor Ckeditor5-html-embed | <35.0.1 | |
| Ckeditor Ckeditor5-html-support | <35.0.1 | |
| Ckeditor Ckeditor5-markdown-gfm | <35.0.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-31175?
CVE-2022-31175 is a cross-site scripting vulnerability affecting three optional packages in CKEditor 5 versions prior to 35.0.1.
Which packages are affected by CVE-2022-31175?
The affected packages are @ckeditor/ckeditor5-html-embed, @ckeditor/ckeditor5-html-support, and @ckeditor/ckeditor5-markdown-gfm.
What is the severity of CVE-2022-31175?
The severity of CVE-2022-31175 is medium with a CVSS score of 4.7.
How can I fix CVE-2022-31175?
To fix CVE-2022-31175, update CKEditor 5 to version 35.0.1 or later.
Where can I find more information about CVE-2022-31175?
You can find more information about CVE-2022-31175 at the following references: https://ckeditor.com/docs/ckeditor5/latest/features/general-html-support.html, https://ckeditor.com/docs/ckeditor5/latest/features/html-embed.html, and https://ckeditor.com/docs/ckeditor5/latest/features/markdown.html.
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