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CVE-2019-6340 — Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x…

Key facts

CVE-2019-6340 is a High (8.1) vulnerability: Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-03-25), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2019-6340 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-03-25), confirming exploitation in the wild. Federal remediation deadline: 2022-04-15. Prioritise patching and deploy the detection and prevention rules below.
CVE CVE-2019-6340
Severity High (8.1)
CISA KEV Actively exploited (added 2022-03-25)
Detection / prevention —
PoC poc.py
Source 2019/CVE-2019-6340/

Details

English | 한국어

Description

Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions is met: The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH or POST requests, or the site has another web services module enabled, like JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7. (Note: The Drupal 7 Services module itself does not require an update at this time, but you should apply other contributed updates associated with this advisory if Services is in use.)

Vulnerability Details

Property Value
CVE ID CVE-2019-6340
Type RCE
CVSS Score 8.1

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2019/CVE-2019-6340/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-2019-6340

# 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

  • http://www.securityfocus.com/bid/107106
  • https://www.drupal.org/sa-core-2019-003
  • https://www.exploit-db.com/exploits/46452/
  • https://www.exploit-db.com/exploits/46459/
  • https://www.exploit-db.com/exploits/46510/
  • https://www.synology.com/security/advisory/Synology_SA_19_09
  • http://www.securityfocus.com/bid/107106
  • https://www.drupal.org/sa-core-2019-003
  • https://www.exploit-db.com/exploits/46452/
  • https://www.exploit-db.com/exploits/46459/
  • https://www.exploit-db.com/exploits/46510/
  • https://www.synology.com/security/advisory/Synology_SA_19_09
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-6340

Generated by PoC Generator on 2026-07-31T01:33:54.168231361

Frequently asked questions

What is CVE-2019-6340?

CVE-2019-6340 is a High (8.1) vulnerability: Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-03-25), confirming active exploitation in the wild.

How do I detect CVE-2019-6340?

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-2019-6340?

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

Is CVE-2019-6340 actively exploited?

Yes. CVE-2019-6340 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2022-03-25, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2022-04-15. Prioritise patching and deploy the detection and prevention rules above.

For authorized security testing and research only. See the full source and NVD record.