# CVE-2021-47778: GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection

> An authenticated administrator can inject arbitrary PHP code via plugin configuration, leading to remote code execution on the server.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jan 2026
- **Updated:** 15 Jul 2026
- **Also known as:** GHSA-6hw4-fq3j-72w9

## What is CVE-2021-47778?

CVE-2021-47778 is a high-severity code injection vulnerability in Get-Simple My SMTP Contact Plugin, published on 21 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

GetSimple CMS My SMTP Contact Plugin 1.1.2 contains a PHP code injection vulnerability. An authenticated administrator can inject arbitrary PHP code through plugin configuration parameters, leading to remote code execution on the server.

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

## Which versions are affected by CVE-2021-47778?

It affects 1 product.


Products: Get-Simple Getsimplecms.

## How do I fix CVE-2021-47778?

No fix has been published for CVE-2021-47778 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47778 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47778 exists.

## Other vulnerabilities in Get-Simple My SMTP Contact Plugin

- [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-2021-47860](https://insights.sbomify.com/CVE-2021-47860/): GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE (high 8.5)
- [CVE-2021-28976](https://insights.sbomify.com/CVE-2021-28976/): File upload in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47778 and fix it if it is affected.

What it is: CVE-2021-47778 is a high-severity code injection vulnerability in Get-Simple My SMTP Contact Plugin, published on 21 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47778 exists.

Affected product: Get-Simple My SMTP Contact 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-2021-47778/ (Markdown: https://insights.sbomify.com/CVE-2021-47778/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47778
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47778
- OSV: https://osv.dev/vulnerability/CVE-2021-47778

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47778/
Summaries are generated and may contain mistakes; the official description above is the record.