# CVE-2023-4243: FULL - Customer <= 2.2.3 - Authenticated(Subscriber+) Improper Authorization to Arbitrary Plugin Installation

> Authenticated subscribers can install arbitrary plugins via improper authorization, leading to remote code execution on WordPress sites.

- **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:** 9 Aug 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-f723-pfg4-v3p5

## What is CVE-2023-4243?

CVE-2023-4243 is a high-severity missing authorization vulnerability in fullservices FULL – Cliente, published on 9 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The FULL - Customer plugin for WordPress is vulnerable to Arbitrary File Upload via the /install-plugin REST route in versions up to, and including, 2.2.3 due to improper authorization. This allows authenticated attackers with subscriber-level permissions and above to execute code by installing plugins from arbitrary remote locations including non-repository sources onto the site, granted they are packaged as a valid WordPress plugin.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2023-4243?

It affects 1 product.


Products: Full Full - Customer.

## How do I fix CVE-2023-4243?

No fix has been published for CVE-2023-4243 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4243 being exploited?

There is no known exploitation of CVE-2023-4243 in the wild and no public exploit code.

## Other vulnerabilities in fullservices FULL – Cliente

- [CVE-2023-4242](https://insights.sbomify.com/CVE-2023-4242/): FULL - Customer <= 2.2.3 - Authenticated(Subscriber+) Information Disclosure via Health Check (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4243 and fix it if it is affected.

What it is: CVE-2023-4243 is a high-severity missing authorization vulnerability in fullservices FULL – Cliente, published on 9 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-4243 in the wild and no public exploit code.

Affected product: fullservices FULL – Cliente. 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-2023-4243/ (Markdown: https://insights.sbomify.com/CVE-2023-4243/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4243
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4243
- OSV: https://osv.dev/vulnerability/CVE-2023-4243

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4243/
Summaries are generated and may contain mistakes; the official description above is the record.