CVE-2026-12126

Description

The WCFM Marketplace – Multivendor Marketplace for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Attachment 'post_title' in all versions up to, and including, 3.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Vendor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. An attacker can plant the payload by uploading a media attachment with a crafted title via the WordPress REST API (/wp-json/wp/v2/media), without ever invoking the AJAX endpoint themselves, as the unescaped title is later emitted inside DataTables JSON and inserted as innerHTML upon any privileged user loading the media dashboard.

CVSS Vector

References

• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.2/controllers/media/wcfmmp-controller-media.php#L120
• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.2/controllers/media/wcfmmp-controller-media.php#L58
• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.2/core/class-wcfmmp-media.php#L163
• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.3/controllers/media/wcfmmp-controller-media.php#L120
• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.3/controllers/media/wcfmmp-controller-media.php#L58
• https://plugins.trac.wordpress.org/browser/wc-multivendor-marketplace/tags/3.7.3/core/class-wcfmmp-media.php#L163
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3588629%40wc-multivendor-marketplace&new=3588629%40wc-multivendor-marketplace
• https://www.wordfence.com/threat-intel/vulnerabilities/id/881ec131-a716-4929-a44e-84bac161d81c?source=cve