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.

PUBLISHED Reserved 2026-04-09 | Published 2026-04-18 | Updated 2026-04-20 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Athiwat Tiprasaharn finder

Itthidej Aramsri finder

References

www.wordfence.com/...-7b3b-4fe1-95fa-e9b63943d533?source=cve

plugins.trac.wordpress.org/...d/class-ufae-frontend-item.php

plugins.trac.wordpress.org/...d/class-ufae-frontend-loop.php

plugins.trac.wordpress.org/...d/class-ufae-frontend-item.php

plugins.trac.wordpress.org/...d/class-ufae-frontend-loop.php

cve.org (CVE-2026-6048)

nvd.nist.gov (CVE-2026-6048)

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