CVE-2026-6048
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.
- Score
- CVSS 3.1 6.4 Medium
- Status
- Deferred - security@wordfence.com
- Published
- 2026-04-18
- Last modified
- 2026-04-20
- Weaknesses
- CWE-79
Affected products
References
- https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.1/widget/simple/ufae-frontend/…
- https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.1/widget/stories/ufae-frontend…
- https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.2/widget/simple/ufae-frontend/…
- https://plugins.trac.wordpress.org/browser/ultimate-flipbox-addon-for-elementor/tags/2.1.2/widget/stories/ufae-frontend…
- https://www.wordfence.com/threat-intel/vulnerabilities/id/faa6ad51-7b3b-4fe1-95fa-e9b63943d533?source=cve
