CVE-2026-12435 | Motors <= 1.4.111 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Meta Modification via 'stm_mark_as_sold_car' Parameter

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.

Published: 2026-07-01 Last update: 2026-07-01 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2026-12435 is rated Low Risk (22.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.23%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-12435

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-01 0.23%

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-12435

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
2.8 1.4 [email protected]

Weakness enumeration for CVE-2026-12435

GitHub Security Advisory for CVE-2026-12435

GHSA-f64c-q58q-9942 · Severity: medium — The Motors – Car Dealership & Classified Listings Plugin plugin for WordPress is vulnerable to...

Affected software / configurations for CVE-2026-12435

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-12435

URL Tags
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/includes/vehicle_functions.php#L2402
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/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/includes/vehicle_functions.php#L2402
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/changeset?sfp_email=&sfph_mail=&reponame=&old=3577332%40motors-car-dealership-classified-listings&new=3577332%40motors-car-dealership-classified-listings&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/5238c344-d685-4eab-822c-d3c1050cc982?source=cve
cvelogic Threat Intelligence