CVE-2026-15983 — The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to…¶

Key facts

CVE-2026-15983 is a High (8.1) vulnerability: The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-15983
Severity	High (8.1)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-15983/

Details¶

English | 한국어

Description¶

The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary File/Directory Deletion in all versions up to, and including, 6.3.316. This is due to the super_save_form AJAX handler performing no capability check — allowing Subscriber-level authenticated users to create or modify Super Forms and enable the file_upload_submission_delete setting — combined with the super_submit_form handler's submit_form function passing the attacker-controlled files[].subdir value from $_POST['data'] directly into SUPER_Common::delete_dir() without sanitization, and a trivially bypassed ABSPATH guard that a subdir value of wp-config.php defeats because dirname(realpath(ABSPATH . $subdir)) resolves to the WordPress root while the naive ABSPATH !== $dir string check fails to match due to a trailing-slash mismatch. This makes it possible for authenticated attackers, with Subscriber-level access and above, to recursively delete arbitrary files and directories on the server, up to and including the entire WordPress installation, resulting in full site takedown and potential remote code execution if critical files such as wp-config.php are removed and the site is subsequently re-installed by another party.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-15983
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-2026-15983/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-2026-15983

# 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://github.com/RensTillmann/super-forms/pull/205
https://www.wordfence.com/threat-intel/vulnerabilities/id/25704473-1200-49df-aa16-9a9558bb4844?source=cve

Generated by PoC Generator on 2026-10-04T05:47:21.766123424

Frequently asked questions¶

What is CVE-2026-15983?¶

CVE-2026-15983 is a High (8.1) vulnerability: The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-15983?¶

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-2026-15983?¶

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.