# CVE-2022-4237: Welcart e-Commerce < 2.8.6 - Subscriber+ PHAR Deserialisation

> Authenticated subscribers can trigger PHAR deserialization via file uploads, potentially leading to remote code execution on the WordPress site.

- **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:** 2 Jan 2023
- **Updated:** 10 Apr 2025
- **Also known as:** GHSA-x65c-cg4w-m3j6

## What is CVE-2022-4237?

CVE-2022-4237 is a high-severity unsafe deserialization vulnerability in Unknown Welcart e-Commerce, published on 2 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Welcart e-Commerce WordPress plugin before 2.8.6 does not validate user input before using it in file_exist() functions via various AJAX actions available to any authenticated users, which could allow users with a role as low as subscriber to perform PHAR deserialisation when they can upload a file and a suitable gadget chain is present on the blog

## Which versions are affected by CVE-2022-4237?

It affects 1 product.


Products: Welcart Welcart E-Commerce.

## How do I fix CVE-2022-4237?

No fix has been published for CVE-2022-4237 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-4237 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4237 exists.

## Other vulnerabilities in Unknown Welcart e-Commerce

- [CVE-2023-5952](https://insights.sbomify.com/CVE-2023-5952/): Welcart e-Commerce < 2.9.5 - Unauthenticated PHP Object Injection (critical 9.8)
- [CVE-2024-42404](https://insights.sbomify.com/CVE-2024-42404/): SQL injection in Welcart e-Commerce (high 8.8)
- [CVE-2023-5953](https://insights.sbomify.com/CVE-2023-5953/): Welcart e-Commerce < 2.9.5 - Subscriber+ Arbitrary File Upload (high 8.8)
- [CVE-2023-43610](https://insights.sbomify.com/CVE-2023-43610/): SQL injection in Welcart e-Commerce (high 8.8)
- [CVE-2023-50847](https://insights.sbomify.com/CVE-2023-50847/): WordPress Welcart e-Commerce Plugin <= 2.9.3 is vulnerable to SQL Injection (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-4237 and fix it if it is affected.

What it is: CVE-2022-4237 is a high-severity unsafe deserialization vulnerability in Unknown Welcart e-Commerce, published on 2 Jan 2023. 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-2022-4237 exists.

Affected product: Unknown Welcart e-Commerce. 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-2022-4237/ (Markdown: https://insights.sbomify.com/CVE-2022-4237/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-4237
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-4237
- OSV: https://osv.dev/vulnerability/CVE-2022-4237

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-4237/
Summaries are generated and may contain mistakes; the official description above is the record.