davidfcarr Quick Playground Plugin up to 1.3.3 on WordPress Path Validation qckply_zip_theme path traversal

Summaryinfo

A vulnerability described as critical has been identified in davidfcarr Quick Playground Plugin up to 1.3.3 on WordPress. This affects the function qckply_zip_theme of the component Path Validation Handler. The manipulation results in path traversal. This vulnerability is reported as CVE-2026-6403. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in davidfcarr Quick Playground Plugin up to 1.3.3 on WordPress. Affected is the function qckply_zip_theme of the component Path Validation Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was disclosed by Athiwat Tiprasaharn and Itthidej Aramsri. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-6403 since 04/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 1.3.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30517). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• davidfcarr

Name

• Quick Playground Plugin

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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