How severe is CVE-2021-3223?

CVE-2021-3223 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-3223 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3223?

CVE-2021-3223 affects Nodered Node-red-dashboard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3223?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-3223 published?

CVE-2021-3223 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2021-3223

CVE-2021-3223 is a high-severity vulnerability in Nodered Node-red-dashboard with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Nodered Node-red-dashboard
Published: 2021-01-26
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-3223?: Node-RED-Dashboard before 2.26.2 allows ui_base/js/..%2f directory traversal to read files.
How severe is CVE-2021-3223?: CVE-2021-3223 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-3223 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3223?: CVE-2021-3223 affects Nodered Node-red-dashboard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3223?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-3223 published?: CVE-2021-3223 was published on 2021-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nodered:node-red-dashboard:*:*:*:*:*:node.js:*:*

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