CVE-2026-6048

Description

The Flipbox Addon for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Flipbox widget's button URL `custom_attributes` field in all versions up to, and including, 2.1.1 due to insufficient validation of custom attribute names. Specifically, the plugin uses `esc_html()` on the attribute name which does not prevent event handler attributes (e.g., `onmouseover`, `onclick`). This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

• https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.1/widget/simple/ufae-frontend/class-ufae-frontend-item.php#L250
• https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.1/widget/stories/ufae-frontend/class-ufae-frontend-loop.php#L248
• https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.2/widget/simple/ufae-frontend/class-ufae-frontend-item.php#L263
• https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.2/widget/stories/ufae-frontend/class-ufae-frontend-loop.php#L253
• https://www.wordfence.com/threat-intel/vulnerabilities/id/faa6ad51-7b3b-4fe1-95fa-e9b63943d533?source=cve