Advisory Published

CVE-2021-24208: XSS

First published: Mon Apr 05 2021(Updated: )

The editor of the WP Page Builder WordPress plugin before 1.2.4 allows lower-privileged users to insert unfiltered HTML, including JavaScript, into pages via the “Raw HTML” widget and the “Custom HTML” widgets (though the custom HTML widget requires sending a crafted request - it appears that this widget uses some form of client side validation but not server side validation), all of which are added via the “page_builder_data” parameter when performing the “wppb_page_save” AJAX action. It is also possible to insert malicious JavaScript via the “wppb_page_css” parameter (this can be done by closing out the style tag and opening a script tag) when performing the “wppb_page_save” AJAX action.


Affected SoftwareAffected VersionHow to fix
Themeum Wp Page Builder<1.2.4

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Frequently Asked Questions

  • What is the vulnerability severity of CVE-2021-24208?

    The vulnerability severity of CVE-2021-24208 is medium with a CVSS score of 5.4.

  • Which software versions are affected by CVE-2021-24208?

    The WP Page Builder WordPress plugin versions up to (but excluding) 1.2.4 are affected by CVE-2021-24208.

  • How can lower-privileged users exploit CVE-2021-24208?

    Lower-privileged users can exploit CVE-2021-24208 by inserting unfiltered HTML, including JavaScript, into pages using the "Raw HTML" widget and the "Custom HTML" widget.

  • Are there any known fixes or patches for CVE-2021-24208?

    Yes, a fix is available for CVE-2021-24208 in version 1.2.4 of the WP Page Builder WordPress plugin.

  • Where can I find more information about CVE-2021-24208?

    You can find more information about CVE-2021-24208 at the following references: [Reference 1]( and [Reference 2](


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