# CVE-2026-12435: Missing authorization in Motors – Car Dealership & Classified Listings Plugin

> Authenticated subscribers can modify arbitrary car listings by replaying nonces, altering sold status and removing featured metadata.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jul 2026
- **Updated:** 1 Jul 2026
- **Also known as:** GHSA-f64c-q58q-9942

## What is CVE-2026-12435?

CVE-2026-12435 is a medium-severity missing authorization vulnerability in stylemix Motors – Car Dealership & Classified Listings Plugin, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-12435?


## How do I fix CVE-2026-12435?

No fix has been published for CVE-2026-12435 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12435 being exploited?

There is no known exploitation of CVE-2026-12435 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12435 and fix it if it is affected.

What it is: CVE-2026-12435 is a medium-severity missing authorization vulnerability in stylemix Motors – Car Dealership & Classified Listings Plugin, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-12435 in the wild and no public exploit code.

Affected product: stylemix Motors – Car Dealership & Classified Listings Plugin. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-12435/ (Markdown: https://insights.sbomify.com/CVE-2026-12435/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12435
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12435
- OSV: https://osv.dev/vulnerability/CVE-2026-12435

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-12435/
Summaries are generated and may contain mistakes; the official description above is the record.