CVE-2026-1830: Quick Playground <= 1.3.1 - Missing Authorization to Unauthenticated Arbitrary File Upload

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-09 · updated 2026-06-17
Weakness: CWE-862

Description

The Quick Playground plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.3.1. This is due to insufficient authorization checks on REST API endpoints that expose a sync code and allow arbitrary file uploads. This makes it possible for unauthenticated attackers to retrieve the sync code, upload PHP files with path traversal, and achieve remote code execution on the server.

Affected products

davidfcarr Quick Playground: through 1.3.1

References

https://plugins.trac.wordpress.org/browser/quick-playground/trunk/api.php#L39
https://plugins.trac.wordpress.org/browser/quick-playground/trunk/expro-api.php#L419
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3500839%40quick-playground&new=3500839%40quick-playground&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/308cd28a-a477-4bc6-a392-ad5a9eca1cb5?source=cve

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