CVE-2026-1830 CRITICAL

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

Vendor Davidfcarr
Product Quick Playground
Weakness CWE-862 · Missing authorization
Published April 9, 2026
Last update April 9, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

Quick Playground versions 1.3.1 and earlier lack authorization checks, allowing unauthenticated attackers to read, modify, or delete data without restriction. The vulnerability requires only network access and no user interaction. All confidentiality, integrity, and availability protections are bypassed.

What an attacker can do

03Attacker Capabilities

Read, modify, or delete any data in the application without authentication.

Potential impact on your site

04Site Impact

Complete compromise of data confidentiality, integrity, and availability if Quick Playground is used on your site.

Conditions required to exploit

05Prerequisites

Network access to the application. No authentication or user interaction required.

Key dates

06Disclosure timeline

April 9, 2026 CVE published
April 9, 2026 Record updated