CVE-2026-12126

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.

• CWE-79

• 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

Published

Jul 11, 2026

Last Modified

Jul 13, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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