# CVE-2023-6139: Essential Real Estate < 4.4.0 - Subscriber+ Denial of Service via Arbitrary Option Update

> Subscribers can cause denial of service by updating arbitrary options due to missing capability checks in AJAX actions.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** 3 Jun 2025
- **Also known as:** GHSA-gm6c-33w6-46gc

## What is CVE-2023-6139?

CVE-2023-6139 is a medium-severity missing authorization 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 apply proper capability checks on its AJAX actions, which among other things, allow attackers with a subscriber account to conduct Denial of Service attacks.

## Which versions are affected by CVE-2023-6139?

It affects 1 product.


Products: G5plus Essential Real Estate.

## How do I fix CVE-2023-6139?

No fix has been published for CVE-2023-6139 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6139 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6139 exists.

## Other vulnerabilities in Unknown Essential Real Estate

- [CVE-2023-6140](https://insights.sbomify.com/CVE-2023-6140/): Essential Real Estate < 4.4 - Subscriber+ Arbitrary File Upload (high 8.8)
- [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-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-2023-6139 and fix it if it is affected.

What it is: CVE-2023-6139 is a medium-severity missing authorization 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-2023-6139 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-2023-6139/ (Markdown: https://insights.sbomify.com/CVE-2023-6139/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6139
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6139
- OSV: https://osv.dev/vulnerability/CVE-2023-6139

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6139/
Summaries are generated and may contain mistakes; the official description above is the record.