CVE-2026-3141 — The FormGent plugin for WordPress is vulnerable to unauthorized arbitrary file deletion…¶
Key facts
CVE-2026-3141 is a Critical (9.1) vulnerability: The FormGent plugin for WordPress is vulnerable to unauthorized arbitrary file deletion…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-3141 |
| Severity | Critical (9.1) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-3141/ |
Details¶
English | 한국어
Description¶
The FormGent plugin for WordPress is vulnerable to unauthorized arbitrary file deletion due to a missing capability check on the /wp-json/formgent/responses/attachments REST API endpoint in all versions up to, and including, 1.9.2 This is due to the REST API route being registered without any authentication middleware in routes/rest/api.php. This makes it possible for unauthenticated attackers to delete arbitrary files within the formgent uploads directory. Additionally, on Linux servers where the wp-content/uploads/formgent directory does not yet exist (the default state after plugin installation), the path traversal protection can be bypassed, enabling deletion of arbitrary files including wp-config.php which can lead to complete site takeover via a fresh WordPress installation.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-3141 |
| Type | PATH_TRAVERSAL |
| CVSS Score | 9.1 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-3141/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-2026-3141
# 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/formgent/tags/1.3.1/app/Http/Controllers/AttachmentController.php#L59
- https://plugins.trac.wordpress.org/browser/formgent/tags/1.3.1/routes/rest/api.php#L27
- https://plugins.trac.wordpress.org/browser/formgent/trunk/app/Http/Controllers/AttachmentController.php#L59
- https://plugins.trac.wordpress.org/browser/formgent/trunk/routes/rest/api.php#L27
- https://plugins.trac.wordpress.org/changeset/3604540/formgent/trunk/app/Http/Controllers/AttachmentController.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fformgent/tags/1.9.2&new_path=%2Fformgent/tags/1.10.0
- https://www.wordfence.com/threat-intel/vulnerabilities/id/097a9d0f-fa38-4fdc-9048-43dd65e7652c?source=cve
Generated by PoC Generator on 2026-08-01T17:57:08.381968385
Frequently asked questions¶
What is CVE-2026-3141?¶
CVE-2026-3141 is a Critical (9.1) vulnerability: The FormGent plugin for WordPress is vulnerable to unauthorized arbitrary file deletion…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-3141?¶
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-2026-3141?¶
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.