CVE-2026-104812

Description

The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'multi_media' Field Array Key in all versions due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The wp_kses_post sanitization applied at save time operates only on array leaf values, leaving array keys entirely unsanitized; the injected key is then rendered directly into an id="filelist-<KEY>" HTML attribute without esc_attr() in Redux_Multi_Media::render(), allowing attribute breakout.

References

• https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/classes/class-redux-helpers.php#L1126
• https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php#L112
• https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/users/class-redux-extension-users.php#L1022
• https://plugins.trac.wordpress.org/changeset/3779521/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9b3d7dfc-d181-4717-a881-e0d04f047a0b?source=cve