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Vulnerability record · CVE-2026-6403 · published 15 May 2026

CVE-2026-6403: Path traversal vulnerability

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.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.0% CWE-22 · Path traversal Deferred
7.5CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
11References
17 Jun 2026Last modified by NVD

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.

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

References

LinkTags
https://plugins.trac.wordpress.org/browser/quick-playground/tags/1.3.1/api.php#L62
https://plugins.trac.wordpress.org/browser/quick-playground/tags/1.3.1/api.php#L631
https://plugins.trac.wordpress.org/browser/quick-playground/tags/1.3.1/utility.php#L162
https://plugins.trac.wordpress.org/browser/quick-playground/tags/1.3.1/utility.php#L248
https://plugins.trac.wordpress.org/browser/quick-playground/trunk/api.php#L62
https://plugins.trac.wordpress.org/browser/quick-playground/trunk/api.php#L631
https://plugins.trac.wordpress.org/browser/quick-playground/trunk/utility.php#L162
https://plugins.trac.wordpress.org/browser/quick-playground/trunk/utility.php#L248
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3514238%40quick-playground&new=3514238%
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3523317%40quick-playground&new=3523317%
https://www.wordfence.com/threat-intel/vulnerabilities/id/a39dccb6-b635-44af-b0e0-c3010b719773?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-6403), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.