CVE-2026-96563

Deferred Deferred - Pending Action

Stored XSS in Motors Car Dealership WordPress Plugin

Publication date: 2026-10-10

Last updated on: 2026-10-13

Assigner: Wordfence

Description

The Motors – Car Dealership & Classified Listings Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'stm_f_s' parameter in all versions up to, and including, 1.4.123 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nonce required by the stm_ajax_add_a_car AJAX handler is emitted in wp_footer on every page, making it accessible to any authenticated user and removing any practical barrier to exploitation at the Subscriber level.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-10

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-10

EPSS Evaluated

2026-10-18

NVD

CVE-2026-96563

EUVD

EUVD-2026-96292

Affected Vendors & Products

Vendor	Product	Version / Range
stylemix	Motors	– Car Dealership & Classified Listings Plugin 0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.

Attack-Flow Graph

Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Motors – Car Dealership & Classified Listings Plugin for WordPress. It allows authenticated attackers with subscriber-level access or higher to inject malicious scripts via the 'stm_f_s' parameter. These scripts execute when users visit affected pages.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Motors – Car Dealership & Classified Listings Plugin versions up to 1.4.123. Check for suspicious scripts in pages via the 'stm_f_s' parameter. Review subscriber-level access logs for unusual AJAX handler activity.

Impact Analysis

An attacker could steal user sessions, redirect users to malicious sites, or perform actions on their behalf. Since the nonce for the AJAX handler is exposed in wp_footer, exploitation is feasible even at the subscriber level, increasing risk for WordPress sites using this plugin.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles. For HIPAA, it may risk protected health information exposure. Compliance failures could result in legal penalties or reputational damage.

Mitigation Strategies

Update the plugin to the latest version beyond 1.4.123. Remove or restrict subscriber-level access if not required. Monitor pages for unauthorized script injections and review WordPress user roles for excessive permissions.

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