CVE-2026-6403 Quick Playground <= 1.3.3 - Unauthenticated Path Traversal to Arbitrary File Read via 'stylesheet' Parameter
Unauthenticated attackers can read arbitrary files, including wp-config, via path traversal in the Quick Playground WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6403?
CVE-2026-6403 is a high-severity path traversal vulnerability in davidfcarr Quick Playground, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-6403?
How do I fix CVE-2026-6403?
No fix has been published for CVE-2026-6403 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-6403 being exploited?
There is no known exploitation of CVE-2026-6403 in the wild and no public exploit code.
Sources
Also known as GHSA-5vxp-83xg-5c9f.