What’s Vulnerable › Vulnerabilities

CVE-2021-24208: WP Page Builder < 1.2.4 - Multiple Stored Cross-Site scripting (XSS)

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-05 · updated 2026-06-17
• Weakness: CWE-79

Description

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 products

• WP Page Builder: before 1.2.4 — fixed in 1.2.4

How to fix

Upgrade to a fixed version: WP Page Builder 1.2.4. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/c20e243d-b0de-4ae5-9a0d-b9d02c9b8141
• https://www.themeum.com/wp-page-builder-updated-v1-2-4/
• https://wpscan.com/vulnerability/c20e243d-b0de-4ae5-9a0d-b9d02c9b8141
• https://www.themeum.com/wp-page-builder-updated-v1-2-4/

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