stylemix Motors Plugin up to 1.4.111 on WordPress stm_mark_as_sold_car authorization

Summaryinfo

A vulnerability classified as critical has been found in stylemix Motors Plugin up to 1.4.111 on WordPress. This issue affects the function stm_mark_as_sold_car. Performing a manipulation results in authorization. This vulnerability was named CVE-2026-12435. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in stylemix Motors Plugin up to 1.4.111 on WordPress. It has been classified as critical. This affects the function stm_mark_as_sold_car. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Michael Perla. It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-12435 since 06/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/01/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40935). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• stylemix

Name

• Motors Plugin

Version

• 1.4.111

CPE 2.3info

• 🔒

CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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