CVE-2026-1830
CriticalExploitedPublic exploitQuick Playground <= 1.3.1 - Missing Authorization to Unauthenticated Arbitrary File Upload
Published Apr 9, 2026 · Updated Apr 9, 2026 · Also known as 308cd28a-a477-4bc6-a392-ad5a9eca1cb5, TR-26-0090
Key Facts
Patch immediately- CVE-2026-1830 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Quick Playground (wordpress-plugin).
- It is exploited in the wild, listed in Industry KEV feed since Oct 13, 2026. Public exploit code is available.
- EPSS estimates a 8.1% probability of exploitation in the next 30 days.
- Fixed versions are available, including Quick Playground 1.3.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
8.1%
Higher than 94.7% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-1830 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 13, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Quick Playgroundwordpress-plugin | See advisory | 1.3.2 |
Patched Releases
Quick Playground
1.3.2
Timeline
Publicly disclosed
Apr 9, 2026
Added to Industry KEV feed
Oct 13, 2026
Weakness Type
- CWE-862 Missing Authorization
References
- advisoryhttps://plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-ajax-nopriv.php#L186
- advisoryhttps://plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-ajax-nopriv.php#L190
- advisoryhttps://plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-ajax-nopriv.php#L233
- advisoryhttps://plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-common.php#L168
- advisoryhttps://plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-functions-user.php#L235
FAQ
Common Questions.
The Quick Playground plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.3.1.
Affected: Quick Playground (wordpress-plugin). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 13, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Quick Playground 1.3.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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