CVE-2020-4046: Authenticated XSS through embed block in WordPress
In affected versions of WordPress, users with low privileges (like contributors and authors) can use the embed block in a certain way to inject unfiltered HTML in the block editor. When affected posts are viewed by a higher privileged user, this could lead to script execution in the editor/wp-admin. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, 4.0.31, 3.9.32, 3.8.34, 3.7.34).
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID for this WordPress vulnerability?
The vulnerability ID for this WordPress vulnerability is CVE-2020-4046.
What is the severity level of CVE-2020-4046?
The severity level of CVE-2020-4046 is medium with a CVSS score of 5.4.
Which users are affected by CVE-2020-4046?
Users with low privileges (like contributors and authors) are affected by CVE-2020-4046.
How can the affected users exploit this vulnerability?
Affected users can use the embed block in a certain way to inject unfiltered HTML in the block editor.
What is the impact of CVE-2020-4046?
The vulnerability could lead to script execution in the editor/wp-admin when affected posts are viewed by a higher privileged user.