# CVE-2023-6049: Estatik Real Estate Plugin < 4.1.1 - Unauthenticated PHP Object Injection

> Unauthenticated attackers can achieve remote code execution via PHP object injection in the Estatik Real Estate Plugin.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jan 2024
- **Updated:** 3 Jun 2025
- **Also known as:** GHSA-5fvv-qqh5-frx3

## What is CVE-2023-6049?

CVE-2023-6049 is a critical unsafe deserialization vulnerability in Unknown Estatik Real Estate Plugin, published on 15 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Estatik Real Estate Plugin WordPress plugin before 4.1.1 unserializes user input via some of its cookies, which could allow unauthenticated users to perform PHP Object Injection when a suitable gadget chain is present on the blog

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2023-6049?

It affects 1 product.


Products: Estatik Estatik.

## How do I fix CVE-2023-6049?

No fix has been published for CVE-2023-6049 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6049 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6049 exists.

## Other vulnerabilities in Unknown Estatik Real Estate Plugin

- [CVE-2016-10958](https://insights.sbomify.com/CVE-2016-10958/): File upload in n/a (high 7.5)
- [CVE-2023-6048](https://insights.sbomify.com/CVE-2023-6048/): Estatik Real Estate Plugin < 4.1.1 - Subscriber+ Arbitrary Option Update (medium 6.5)
- [CVE-2016-10959](https://insights.sbomify.com/CVE-2016-10959/): File upload in n/a (medium 6.5)
- [CVE-2023-6050](https://insights.sbomify.com/CVE-2023-6050/): Estatik Real Estate Plugin < 4.1.1 - Reflected XSS (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6049 and fix it if it is affected.

What it is: CVE-2023-6049 is a critical unsafe deserialization vulnerability in Unknown Estatik Real Estate Plugin, published on 15 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6049 exists.

Affected product: Unknown Estatik Real Estate 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-2023-6049/ (Markdown: https://insights.sbomify.com/CVE-2023-6049/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6049
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6049
- OSV: https://osv.dev/vulnerability/CVE-2023-6049

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6049/
Summaries are generated and may contain mistakes; the official description above is the record.