wclovers WCFM Marketplace Plugin up to 3.7.3 on WordPress Media /wp-json/wp/v2/media innerHTML post_title cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in wclovers WCFM Marketplace Plugin up to 3.7.3. Affected by this issue is the function innerHTML of the file /wp-json/wp/v2/media of the component Media. Performing a manipulation of the argument post_title results in cross site scripting. This vulnerability was named CVE-2026-12126. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in wclovers WCFM Marketplace Plugin up to 3.7.3. It has been classified as problematic. This affects the function innerHTML of the file /wp-json/wp/v2/media of the component Media. The manipulation of the argument post_title with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-12126 since 06/12/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• wclovers

Name

• WCFM Marketplace Plugin

Version

• 3.7.0
• 3.7.1
• 3.7.2
• 3.7.3

CPE 2.3info

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CPE 2.2info

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