CVE-2026-12126 WCFM Marketplace <= 3.7.3 - Authenticated (Vendor+) Stored Cross-Site Scripting via Attachment 'post_title'

Q: What is CVE-2026-12126?

CVE-2026-12126 is a medium-severity cross-site scripting vulnerability in wclovers WCFM Marketplace – Multivendor Marketplace for WooCommerce, published on 11 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Q: Is CVE-2026-12126 being exploited?

There is no known exploitation of CVE-2026-12126 in the wild and no public exploit code.

Q: How do I fix CVE-2026-12126?

No fix has been published for CVE-2026-12126 yet. Limit exposure of the affected software until one is available.

Medium 6.4 Published 11 Jul 2026 Updated 13 Jul 2026

Authenticated vendors can inject arbitrary scripts via attachment titles, leading to code execution or account takeover when privileged users view the media dashboard.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-12126?

CVE-2026-12126 is a medium-severity cross-site scripting vulnerability in wclovers WCFM Marketplace – Multivendor Marketplace for WooCommerce, published on 11 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-12126?

How do I fix CVE-2026-12126?

No fix has been published for CVE-2026-12126 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-12126 being exploited?