# CVE-2023-6188: GetSimpleCMS theme-edit.php code injection

> Remote attackers with permissions can inject code via theme-edit.php in GetSimpleCMS, leading to arbitrary code execution.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Nov 2023
- **Updated:** 4 Sep 2024
- **Also known as:** GHSA-7q8c-wgc5-qrph

## What is CVE-2023-6188?

CVE-2023-6188 is a medium-severity code injection vulnerability in GetSimpleCMS, published on 17 Nov 2023. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was found in GetSimpleCMS 3.3.16/3.4.0a. It has been rated as critical. This issue affects some unknown processing of the file /admin/theme-edit.php. The manipulation leads to code injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-245735.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2023-6188?

It affects 1 product.


Products: Get-Simple Getsimplecms.

## How do I fix CVE-2023-6188?

No fix has been published for CVE-2023-6188 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6188 being exploited?

There is no known exploitation of CVE-2023-6188 in the wild and no public exploit code.

## Other vulnerabilities in GetSimpleCMS

- [CVE-2023-46042](https://insights.sbomify.com/CVE-2023-46042/): Code injection in n/a (critical 9.8)
- [CVE-2020-18191](https://insights.sbomify.com/CVE-2020-18191/): Path traversal in n/a (critical 9.1)
- [CVE-2013-10032](https://insights.sbomify.com/CVE-2013-10032/): GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload (high 8.7)
- [CVE-2021-47778](https://insights.sbomify.com/CVE-2021-47778/): GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection (high 8.6)
- [CVE-2021-47860](https://insights.sbomify.com/CVE-2021-47860/): GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6188 and fix it if it is affected.

What it is: CVE-2023-6188 is a medium-severity code injection vulnerability in GetSimpleCMS, published on 17 Nov 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-6188 in the wild and no public exploit code.

Affected product: GetSimpleCMS. 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-2023-6188/ (Markdown: https://insights.sbomify.com/CVE-2023-6188/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6188
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6188
- OSV: https://osv.dev/vulnerability/CVE-2023-6188

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6188/
Summaries are generated and may contain mistakes; the official description above is the record.