CVE-2026-6403 json
Quick Playground <= 1.3.3 - Unauthenticated Path Traversal to Arbitrary File Read via 'stylesheet' Parameter
published 2026-05-15 5 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-30517
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- davidfcarr Quick Playground
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/a39dccb6-b635-44af-b0e0-c3010b719773?source=cve
- plugins.trac.wordpress.org /browser/quick-playground/trunk/utility.php#L162
- plugins.trac.wordpress.org /browser/quick-playground/tags/1.3.1/utility.php#L162
- plugins.trac.wordpress.org /browser/quick-playground/trunk/api.php#L62
- plugins.trac.wordpress.org /browser/quick-playground/tags/1.3.1/api.php#L62
- plugins.trac.wordpress.org /browser/quick-playground/trunk/utility.php#L248
- plugins.trac.wordpress.org /browser/quick-playground/tags/1.3.1/utility.php#L248
- plugins.trac.wordpress.org /browser/quick-playground/trunk/api.php#L631
- plugins.trac.wordpress.org /browser/quick-playground/tags/1.3.1/api.php#L631
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3523317%40quick-playground&new=3523317%40quick-playground&sfp_e
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3514238%40quick-playground&new=3514238%40quick-playground&sfp_e
Sources
- CVE List CVE-2026-6403
- NVD CVE-2026-6403
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.