CVE-2026-86461 — The FV Flowplayer Video Player plugin for WordPress is vulnerable to Limited Arbitrary…¶
Key facts
CVE-2026-86461 is a High (8.8) vulnerability: The FV Flowplayer Video Player plugin for WordPress is vulnerable to Limited Arbitrary…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-86461 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-86461/ |
Details¶
English | 한국어
Description¶
The FV Flowplayer Video Player plugin for WordPress is vulnerable to Limited Arbitrary File Upload in all versions up to, and including, 7.5.54.7212 via the check_mimetype function. This is due to incomplete file type validation in the check_mimetype function — while some extension checking is present, it can be bypassed, allowing attacker-supplied remote file content to be written with insufficient extension enforcement and no MIME check or WordPress upload helper. This makes it possible for authenticated attackers, with subscriber-level access and above, to upload files that may be executable, which makes remote code execution possible. Exploitation requires the plugin's 'profile videos on bio' option to be enabled, as this causes the nonce to be emitted on the subscriber-accessible profile page; without this setting, authenticated users below Editor cannot obtain the required nonce.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-86461 |
| Type | RCE |
| CVSS Score | 8.8 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-86461/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-2026-86461
# 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/fv-wordpress-flowplayer/trunk/models/checker.php?rev=3652655#L107
- https://plugins.trac.wordpress.org/changeset/3731114/fv-wordpress-flowplayer
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3dacc612-5300-497a-9d6a-0944906e180c?source=cve
Generated by PoC Generator on 2026-10-15T09:41:40.638633172
Frequently asked questions¶
What is CVE-2026-86461?¶
CVE-2026-86461 is a High (8.8) vulnerability: The FV Flowplayer Video Player plugin for WordPress is vulnerable to Limited Arbitrary…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-86461?¶
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-2026-86461?¶
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.