CVE-2026-87935 — The Paid Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in all…¶
Key facts
CVE-2026-87935 is a High (8.1) vulnerability: The Paid Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in all…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-87935 |
| Severity | High (8.1) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-87935/ |
Details¶
English | 한국어
Description¶
The Paid Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.15 via the admin_request_handler function. This is due to missing authorization and file type validation in the admin_request_handler function, which is reachable unauthenticated via is_admin() returning true for /wp-admin/admin-post.php. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. On Apache servers where AllowOverride is enabled, an .htaccess file placed in the upload directory may block direct HTTP retrieval of uploaded files, limiting exploitability to stacks that do not honor .htaccess directives such as nginx, LiteSpeed, and Apache with AllowOverride None.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-87935 |
| Type | RCE |
| CVSS Score | 8.1 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-87935/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-87935
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://plugins.trac.wordpress.org/browser/paid-downloads/tags/3.15/paid-downloads.php#L1036
- https://plugins.trac.wordpress.org/browser/paid-downloads/tags/3.15/paid-downloads.php#L1902
- https://plugins.trac.wordpress.org/browser/paid-downloads/tags/3.15/paid-downloads.php#L79
- https://plugins.trac.wordpress.org/browser/paid-downloads/tags/3.15/paid-downloads.php#L941
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3f0251e5-e575-4662-b81d-72c106e92b50?source=cve
Generated by PoC Generator on 2026-09-17T15:35:41.014800538
Frequently asked questions¶
What is CVE-2026-87935?¶
CVE-2026-87935 is a High (8.1) vulnerability: The Paid Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in all…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-87935?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-87935?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.