# Motors – Car Dealership & Classified Listings <= 1.4.124 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'stm_f_s' Parameter

- **ID:** WPSEC-2026-0481
- **Plugin:** Motors – Car Dealership & Classified Listings Plugin (`motors-car-dealership-classified-listings`), https://wordpress.org/plugins/motors-car-dealership-classified-listings/
- **Affected versions:** from 1.4.69 before 1.4.125
- **Fixed in:** 1.4.125 (Update to 1.4.125 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-06)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/motors-car-dealership-classified-listings
- **Fix released:** 2026-10-05
- **Published:** 2026-10-06
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0481/

## Description

The Motors – Car Dealership & Classified Listings plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'stm_f_s' parameter in versions 1.4.69 up to, and including, 1.4.124 due to insufficient input sanitization and output escaping. Values submitted when adding or editing a listing are saved as listing category term names with HTML-entity-encoded markup intact, even if the listing itself is held for moderation, and the front-end inventory filter dropdowns later insert these term names into the page as HTML. This makes it possible for authenticated attackers, with Subscriber-level access and above, who are permitted to submit or edit listings, to inject arbitrary web scripts that execute when a user views and uses an inventory filter that lists the injected term.

## References

- https://wpsec.com/vuln/WPSEC-2026-0481/
- https://plugins.svn.wordpress.org/motors-car-dealership-classified-listings/tags/1.4.125/
- https://wordpress.org/plugins/motors-car-dealership-classified-listings/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0481/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.