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

7.5
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE CVE-2026-6403
CVSS 7.5 (High)
Publicly Published May 14, 2026
Last Updated May 15, 2026
Researchers Athiwat Tiprasaharn (Jitlada)
Itthidej Aramsri (Boeing777)

Description

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.

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Vulnerability Details for Quick Playground

Software Type Plugin
Software Slug quick-playground (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.3.4, or a newer patched version
Affected Version
  • <= 1.3.3
Patched Version
  • 1.3.4

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