CVE-2021-3223 Exploited in the Wild — Node-RED-Dashboard

Vendor	Product	Version	Status
n/a	n/a	n/a	Affected

Known Exploited Vulnerability Sources

Catalogues that list this CVE as a known exploited vulnerability.

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

Source	Added
The Shadowserver First	2026-04-14 00:00 UTC

Scanner Artifacts

Nuclei and Metasploit references linked to this CVE.

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-3223.yaml	Apr 25, 2025

Virtual Patch

Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.

Not available

KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.

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CVSS Scores

CVSS v3.1 7.5 High

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

CVSS v2.0 5.0 Medium

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

Exploitation Status

Exploited in the wild

Recorded 2026-04-14 00:00:00 UTC · The Shadowserver

Proof of concept available

Recorded 2026-06-12 14:20:22 UTC · Nuclei Templates

Scanner Integrations

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-3223.yaml	Apr 25, 2025

Potential Proof of Concepts

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

Node RED Dashboard <2.26.2 - Local File Inclusion

nuclei · Created Unknown

Timeline

Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.

12 Jun 2026 14:20 UTC about 1 month ago

12 Jun 2026 14:20 UTC · about 1 month ago

Public PoC available

Public proof-of-concept code published
14 Apr 2026 00:00 UTC 3 months ago

14 Apr 2026 00:00 UTC · 3 months ago

Added to KEVIntel KEV Feed

High-confidence, third-party attested exploitation
25 Apr 2025 00:00 UTC about 1 year ago

25 Apr 2025 00:00 UTC · about 1 year ago

Nuclei template available

Scanner coverage available
26 Jan 2021 05:58 UTC over 5 years ago

26 Jan 2021 05:58 UTC · over 5 years ago

CVE published

Vulnerability disclosed publicly
22 Jan 2021 00:00 UTC over 5 years ago

22 Jan 2021 00:00 UTC · over 5 years ago

CVE ID reserved

Identifier reserved by the CNA

Automate This Intelligence with the Pro API

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

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Pro API Example

GET /api/v2/pro/kevs/CVE-2021-3223

{
  "cve_id": "CVE-2021-3223",
  "title": "Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal ...",
  "affected_vendor": "Node-RED",
  "affected_product": "Node-RED-Dashboard",
  "affected_versions": [
    { "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
  ],
  "confidence": "High",
  "cvss_score": 7.5,
  "epss_score": null,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "...": "Pro API fields" },
  "proof_of_concepts": [ "..." ],
  "scanner_integrations": [ "..." ]
}

The free JSON API returns basic KEV fields only. Confidence, telemetry, and artifact enrichment require Pro API access.

CVE-2021-3223

At a Glance

Affected Versions

CVE References

Recommended Actions