CVE-2026-96563

Motors <= 1.4.123 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'stm_f_s' Parameter

2026-10-09 19:21
Kamil B.

Strategic Overview

Status
Unpatched
Affected Plugin
Motors – Car Dealership & Classified Listings Plugin
Affected Version
<= 1.4.123
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-96563
View all Motors – Car Dealership & Classified Listings Plugin vulnerabilities

At a glance

CVE-2026-96563 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Motors WordPress plugin, affecting versions <= 1.4.123. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed October 2026, reported by Kamil B..

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Motors <= 1.4.123 carries this weakness at stm_f_s, and reaching it takes an account at Subscriber level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. No fixed build of this plugin is recorded for Motors yet, so installs running <= 1.4.123 stay exposed until the vendor ships one.

Remediation

No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-96563https://www.wordfence.com/threat-intel/vulnerabilities/id/14bb850e-df8a-46f0-b320-d8aedd763901https://nvd.nist.gov/vuln/detail/CVE-2026-96563

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C