CVE-2026-12126: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in wclovers WCFM Marketplace – Multivendor Marketplace for WooCommerce
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.
AI Analysis
Technical Summary
CVE-2026-12126 is a stored cross-site scripting vulnerability (CWE-79) in the WCFM Marketplace plugin for WooCommerce. The flaw exists in the handling of the 'post_title' field of media attachments uploaded via the WordPress REST API. Authenticated attackers with Vendor-level privileges can craft a media attachment title containing malicious scripts. Because the plugin fails to properly sanitize and escape this input, the malicious script is embedded in JSON data used by DataTables and executed as innerHTML when privileged users load the media dashboard. This vulnerability affects all versions up to and including 3.7.3.
Potential Impact
Successful exploitation allows an attacker with Vendor-level access to execute arbitrary JavaScript in the context of privileged users viewing the media dashboard. This can lead to information disclosure and potential further compromise of the affected WordPress site. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, required privileges, no user interaction, and impact on confidentiality and integrity but no impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Vendor-level access to trusted users only and monitor for suspicious activity. Avoid loading the media dashboard with untrusted media titles. Follow the vendor's guidance once published.
CVE-2026-12126: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in wclovers WCFM Marketplace – Multivendor Marketplace for WooCommerce
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 v3.1
Score 6.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12126 is a stored cross-site scripting vulnerability (CWE-79) in the WCFM Marketplace plugin for WooCommerce. The flaw exists in the handling of the 'post_title' field of media attachments uploaded via the WordPress REST API. Authenticated attackers with Vendor-level privileges can craft a media attachment title containing malicious scripts. Because the plugin fails to properly sanitize and escape this input, the malicious script is embedded in JSON data used by DataTables and executed as innerHTML when privileged users load the media dashboard. This vulnerability affects all versions up to and including 3.7.3.
Potential Impact
Successful exploitation allows an attacker with Vendor-level access to execute arbitrary JavaScript in the context of privileged users viewing the media dashboard. This can lead to information disclosure and potential further compromise of the affected WordPress site. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, required privileges, no user interaction, and impact on confidentiality and integrity but no impact on availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Vendor-level access to trusted users only and monitor for suspicious activity. Avoid loading the media dashboard with untrusted media titles. Follow the vendor's guidance once published.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-12T15:16:02.267Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a51e39f68715ace434f56d8
Added to database: 07/11/2026, 06:33:03 UTC
Last enriched: 07/11/2026, 06:48:15 UTC
Last updated: 07/11/2026, 20:48:58 UTC
Views: 14
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