# CVE-2026-1830: Quick Playground <= 1.3.1 - Missing Authorization to Unauthenticated Arbitrary File Upload

> Unauthenticated attackers can upload arbitrary PHP files via REST API endpoints to achieve remote code execution on WordPress sites using the Quick Playground 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:** 9 Apr 2026
- **Updated:** 9 Apr 2026
- **Also known as:** GHSA-8jp3-8878-6q85

## What is CVE-2026-1830?

CVE-2026-1830 is a critical missing authorization vulnerability in davidfcarr Quick Playground, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Quick Playground plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.3.1. This is due to insufficient authorization checks on REST API endpoints that expose a sync code and allow arbitrary file uploads. This makes it possible for unauthenticated attackers to retrieve the sync code, upload PHP files with path traversal, and achieve remote code execution on the server.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-1830?


## How do I fix CVE-2026-1830?

No fix has been published for CVE-2026-1830 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1830 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1830 exists.

Public exploit code:

- Quick Playground for WordPress 1.3.1 - Unauthenticated Remote Code Execution (exploitdb)
- Quick Playground <= 1.3.1 - Missing Authorization to Unauthenticated Arbitrary File Upload (nuclei): http/cves/2026/CVE-2026-1830.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1830 and fix it if it is affected.

What it is: CVE-2026-1830 is a critical missing authorization vulnerability in davidfcarr Quick Playground, published on 9 Apr 2026. 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-2026-1830 exists.

Affected product: davidfcarr Quick Playground. 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-2026-1830/ (Markdown: https://insights.sbomify.com/CVE-2026-1830/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1830
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1830
- OSV: https://osv.dev/vulnerability/CVE-2026-1830

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1830/
Summaries are generated and may contain mistakes; the official description above is the record.