CVE-2026-6403 HIGH

CVE-2026-6403: Quick Playground <= 1.3.3 - Unauthenticated Path Traversal to Arbitrary File Read via 'stylesheet' Parameter

Vendor Davidfcarr
Product Quick Playground
Weakness CWE-22 · Path traversal
Published May 15, 2026
Last update May 15, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

The Quick Playground plugin for WordPress is vulnerable to Path Traversal in versions up to and including 1.3.3. This is due to insufficient path validation in the qckply_zip_theme() function, which appends a user-controlled 'stylesheet' parameter directly to the theme root directory path without sanitizing directory traversal sequences. This makes it possible for unauthenticated attackers to trigger the creation of a ZIP archive containing arbitrary files from the server's filesystem — including wp-config.

Explanation of Vulnerability in Simple Terms

02Summary

Quick Playground versions 1.3.3 and earlier contain a path traversal vulnerability that allows unauthenticated attackers to read arbitrary files from the server. An attacker can craft requests to access files outside the intended directory, potentially exposing sensitive configuration files, source code, or other confidential data. No user interaction is required.

What an attacker can do

03Attacker Capabilities

Read arbitrary files from the server, including sensitive configuration and source code.

Potential impact on your site

04Site Impact

Sensitive files on the server may be exposed to unauthorized access, including database credentials or API keys.

Conditions required to exploit

05Prerequisites

Network access to the application; no authentication or user interaction required.

Key dates

06Disclosure timeline

May 15, 2026 CVE published
May 15, 2026 Record updated