CVE-2021-3223: Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal to read files.

Q: How do I fix CVE-2021-3223?

node-red-dashboard: upgrade to 2.26.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-3223 being exploited?

CVE-2021-3223 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-3223 affect?

CVE-2021-3223 affects node-red-dashboard. Severity is high (CVSS 7.5). Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal to read files.

Q: How urgent is CVE-2021-3223?

Priority 56/100. High severity; EPSS top 3%: very likely to be exploited; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-3223 is a high-severity flaw (CVSS 7.5) affecting node-red-dashboard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal to read files.

Why this priority

High severity
EPSS top 3%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	18.9% (top 3%)
CISA exploited list	No
Weakness	CWE-22
Published	2021-01-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nodered

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-01-26 18:16 UTCPublished CVE record published
2026-06-17 04:04 UTCUpdated Record last modified

nodered node-red-dashboard UPGRADE

Affected: < 2.26.2

Fixed in: 2.26.2

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls node-red-dashboard

2. UPGRADE to 2.26.2

npm install node-red-dashboard@">=2.26.2"

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Node RED Dashboard <2.26.2 - Local File Inclusion

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-3223?

node-red-dashboard: upgrade to 2.26.2. Exact commands for each OS are on this page.

Is CVE-2021-3223 being exploited?

CVE-2021-3223 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-3223 affect?

CVE-2021-3223 affects node-red-dashboard. Severity is high (CVSS 7.5). Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal to read files.

How urgent is CVE-2021-3223?

Priority 56/100. High severity; EPSS top 3%: very likely to be exploited; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-3783 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, has been found in node-red-dashboard

References

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