CVE-2026-109973

Vulnerability Description

The Image Hover Effects Ultimate Visual Composer (Flipbox - Awesomes Flip Boxes Image Overlay) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'flip-box-image-upload-url-01-alt' parameter in versions up to, and including, 3.1.1. This is due to the plugin saving the image-alt field through sanitize_text_field() in Inc/Style22::register_child() (and Inc/Style18, 19, 20, 25, 29) — which preserves the double-quote character — and then concatenating the stored value into a double-quoted HTML attribute in Public_Render/Style22::default_render() (and the corresponding Style18/19/20/25/29 renderers) with no esc_attr() escaping. This makes it possible for authenticated attackers, with contributor-level access and above (when an administrator has delegated the plugin's 'Who can edit' capability via the plugin Settings page, or on multisite installations where even administrators lack unfiltered_html), to inject arbitrary web scripts in pages that will execute whenever a user accesses any page containing an affected [oxilab_flip_box] shortcode or block.

CVSS Score

Related Weaknesses (CWE)

References

• https://plugins.trac.wordpress.org/browser/image-hover-effects-ultimate-visual-c
• https://plugins.trac.wordpress.org/browser/image-hover-effects-ultimate-visual-c
• https://plugins.trac.wordpress.org/browser/image-hover-effects-ultimate-visual-c
• https://plugins.trac.wordpress.org/browser/image-hover-effects-ultimate-visual-c
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3762680%40image-hover
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c3403cd6-31ba-4c36-a60