CVE-2021-41277 — Metabase is an open source data analytics platform.¶

Key facts

CVE-2021-41277 is a Critical (10.0) vulnerability: Metabase is an open source data analytics platform.. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2024-11-12), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2021-41277 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2024-11-12), confirming exploitation in the wild. Federal remediation deadline: 2024-12-03. Prioritise patching and deploy the detection and prevention rules below.


CVE	CVE-2021-41277
Severity	Critical (10.0)
CISA KEV	Actively exploited (added 2024-11-12)
Detection / prevention	—
PoC	poc.py
Source	2021/CVE-2021-41277/

Details¶

English | 한국어

Description¶

Metabase is an open source data analytics platform. In affected versions a security issue has been discovered with the custom GeoJSON map (admin->settings->maps->custom maps->add a map) support and potential local file inclusion (including environment variables). URLs were not validated prior to being loaded. This issue is fixed in a new maintenance release (0.40.5 and 1.40.5), and any subsequent release after that. If you’re unable to upgrade immediately, you can mitigate this by including rules in your reverse proxy or load balancer or WAF to provide a validation filter before the application.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2021-41277
Type	RCE
CVSS Score	10.0

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2021/CVE-2021-41277/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-2021-41277

# 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/metabase/metabase/commit/042a36e49574c749f944e19cf80360fd3dc322f0
https://github.com/metabase/metabase/security/advisories/GHSA-w73v-6p7p-fpfr
https://github.com/metabase/metabase/commit/042a36e49574c749f944e19cf80360fd3dc322f0
https://github.com/metabase/metabase/security/advisories/GHSA-w73v-6p7p-fpfr
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41277

Generated by PoC Generator on 2026-06-23T16:48:05.75901298

Frequently asked questions¶

What is CVE-2021-41277?¶

CVE-2021-41277 is a Critical (10.0) vulnerability: Metabase is an open source data analytics platform.. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2024-11-12), confirming active exploitation in the wild.

How do I detect CVE-2021-41277?¶

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-2021-41277?¶

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-2021-41277 actively exploited?¶

Yes. CVE-2021-41277 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2024-11-12, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2024-12-03. Prioritise patching and deploy the detection and prevention rules above.

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