Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2021-41277

metabase

Metabase · affected before 0.40.5

Watch CVE-2021-41277 Browse KEV feed
Severity
CVSS 10.0 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
97.2%
First observed
30 Jun 2026
Last observed
17 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-41277 is an unauthenticated vulnerability affecting metabase. Metabase is an open source data analytics platform. In affected versions a security issue has been discovered with the custom GeoJSON map...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

metabase affected before 0.40.5.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Metabase is an open source data analytics platform

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.

metabase Affected
metabase
Before 0.40.5 >= 1.0.0, < 1.40.5
Published
17 Nov 2021
Exploitation Reported
12 Nov 2024
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa nuclei_scanner nessus_scanner

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2021-41277
  • GitHub — metabase/metabase github.com · CVE Record https://github.com/metabase/metabase/security/advisories/GHSA-w73v-6p...
  • GitHub — metabase/metabase github.com · CVE Record https://github.com/metabase/metabase/commit/042a36e49574c749f944e19cf...

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 12 Nov 2024

A trusted third party reported exploitation.

Active exploitation observed

Previdian sensor

First observed 30 Jun 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

Nuclei Templates

Recorded 12 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2024-11-12 00:00 UTC
The Shadowserver 2026-06-02 00:00 UTC
Previdian Sensors 2026-07-29 10:26 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

101

Attempts observed

13

Unique attacker IPs

5

Attacker countries

DE · NL · RU · US · YE

31

Sensors observed

CVE-2021-41277 exploitation attempts over the last 91 days

Daily events observed by Previdian sensors

Updated 18 Oct 2026

2
3
2
3
0
2
2
0
1
32
22
8
3
0
0
0
0
1
5
0
1
0
0
0
1
0
0
0
0
0
0
3
0
0
1
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
2
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
20 Jul 8 Aug 27 Aug 15 Sep 18 Oct

First observed 30 Jun 2026 · Last observed 17 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
3
4
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-41277.yaml 25 Apr 2025
Nessus https://www.tenable.com/plugins/nessus/163589 08 Mar 2023

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

10.0 Critical

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

EPSS

97.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Exposure of Sensitive Information to an Unauthorized Actor CWE-200

All CVSS Scores

CVSS v3.1 10.0 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

CVSS v2.0 5.0 Medium

AV:N/AC:L/Au:N/C:P/I:N/A:N

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Metabase - Local File Inclusion

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 18:33 UTC

    Indicators of compromise added (17)

    Indicators of compromise recorded

  2. 18:33 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  3. 14:20 UTC

    Public PoC available

    Public proof-of-concept code published

  4. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  5. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  6. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  7. 01:05 UTC

    Nessus plugin available

    Scanner coverage available

  8. 20:05 UTC

    CVE published

    Vulnerability disclosed publicly

  9. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2021-41277

Sample API response 
{
  "cve_id": "CVE-2021-41277",
  "confidence": "Confirmed",
  "cvss_score": 10.0,
  "cvss_estimated": false,
  "epss_score": 0.97178,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 101, "sensors": 31 }
}