Auth bypass in Davidfcarr Quick Playground

CVE-2026-1830

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.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.081 (94.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-1830: held from 0.081 to 0.081.

EPSS over last 30 days · oldest: 0.081 · newest: 0.081 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-1830?
CVE-2026-1830 is a critical-severity vulnerability in Davidfcarr Quick Playground, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-04-09.
How severe is CVE-2026-1830?
Critical severity. CVSS v3 base score is 9.8 out of 10.