# CVE-2023-6140: Essential Real Estate < 4.4 - Subscriber+ Arbitrary File Upload

> Subscribers can upload malicious PHP files disguised as ZIP archives, leading to remote code execution on sites using the Essential Real Estate plugin.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 8 Jan 2024
- **Updated:** 4 Sep 2024
- **Also known as:** GHSA-pmx3-5c86-vxfm

## What is CVE-2023-6140?

CVE-2023-6140 is a high-severity vulnerability in Unknown Essential Real Estate, published on 8 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Essential Real Estate WordPress plugin before 4.4.0 does not prevent users with limited privileges on the site, like subscribers, from momentarily uploading malicious PHP files disguised as ZIP archives, which may lead to remote code execution.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-6140?

It affects 1 product.


Products: G5plus Essential Real Estate.

## How do I fix CVE-2023-6140?

No fix has been published for CVE-2023-6140 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6140 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6140 exists.

## Other vulnerabilities in Unknown Essential Real Estate

- [CVE-2025-48126](https://insights.sbomify.com/CVE-2025-48126/): WordPress Essential Real Estate plugin <= 5.2.9 - Local File Inclusion vulnerability (high 8.1)
- [CVE-2025-30849](https://insights.sbomify.com/CVE-2025-30849/): WordPress Essential Real Estate plugin <= 5.2.0 - Local File Inclusion Vulnerability (high 8.1)
- [CVE-2023-6827](https://insights.sbomify.com/CVE-2023-6827/): Essential Real Estate <= 4.3.5 - Authenticated (Subscriber+) Arbitrary File Upload (high 7.5)
- [CVE-2023-6139](https://insights.sbomify.com/CVE-2023-6139/): Essential Real Estate < 4.4.0 - Subscriber+ Denial of Service via Arbitrary Option Update (medium 6.5)
- [CVE-2024-4273](https://insights.sbomify.com/CVE-2024-4273/): Essential Real Estate <= 4.4.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6140 and fix it if it is affected.

What it is: CVE-2023-6140 is a high-severity vulnerability in Unknown Essential Real Estate, published on 8 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6140 exists.

Affected product: Unknown Essential Real Estate. 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-2023-6140/ (Markdown: https://insights.sbomify.com/CVE-2023-6140/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6140
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6140
- OSV: https://osv.dev/vulnerability/CVE-2023-6140

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6140/
Summaries are generated and may contain mistakes; the official description above is the record.