CVE-2021-32808: Cross-site scripting in ckeditor via abuse of undo functionality
ckeditor is an open source WYSIWYG HTML editor with rich content support. A vulnerability has been discovered in the clipboard Widget plugin if used alongside the undo feature. The vulnerability allows a user to abuse undo functionality using malformed widget HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at version >= 4.13.0. The problem has been recognized and patched. The fix will be available in version 4.16.2.
Other sources
CKEditor is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the clipboard Widget plugin if used alongside the undo feature. A remote attacker could exploit this vulnerability using malformed widget HTML, which would be executed in a victim's Web browser within the security context of the hosting Web site, once the page is viewed. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.
— IBM
Affected Software
Remediation
Patch Available
Patch Available
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Frequently Asked Questions
What is CVE-2021-32808?
CVE-2021-32808 is a vulnerability in CKEditor that allows for cross-site scripting if the clipboard Widget plugin is used alongside the undo feature.
How does CVE-2021-32808 affect CKEditor?
CVE-2021-32808 affects CKEditor by allowing a remote attacker to execute malicious code in a victim's web browser.
What is the severity level of CVE-2021-32808?
CVE-2021-32808 has a severity level of 7.6, which is considered high.
How can the CVE-2021-32808 vulnerability be exploited?
The CVE-2021-32808 vulnerability can be exploited by using malformed widget HTML in conjunction with the undo feature in CKEditor.
Is there a fix available for CVE-2021-32808?
Yes, CKEditor has released a fix for CVE-2021-32808. It is recommended to update to the latest version of CKEditor to mitigate the vulnerability.