How severe is CVE-2023-30583?

CVE-2023-30583 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-2023-30583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-30583?

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.

Does CVE-2023-30583 have an EU (EUVD) identifier?

Yes. CVE-2023-30583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-34964.

When was CVE-2023-30583 published?

CVE-2023-30583 was published on 2024-09-07 and last updated on 2026-06-17.

CVE-2023-30583

CVE-2023-30583 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-34964
Weakness: CWE-284
Published: 2024-09-07
Last modified: 2026-06-17

Description

fs.openAsBlob() can bypass the experimental permission model when using the file system read restriction with the `--allow-fs-read` flag in Node.js 20. This flaw arises from a missing check in the `fs.openAsBlob()` API. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

Frequently asked questions

What is CVE-2023-30583?: fs.openAsBlob() can bypass the experimental permission model when using the file system read restriction with the `--allow-fs-read` flag in Node.js 20. This flaw arises from a missing check in the `fs.openAsBlob()` API. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.
How severe is CVE-2023-30583?: CVE-2023-30583 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-2023-30583 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-30583?: 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.
Does CVE-2023-30583 have an EU (EUVD) identifier?: Yes. CVE-2023-30583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-34964.
When was CVE-2023-30583 published?: CVE-2023-30583 was published on 2024-09-07 and last updated on 2026-06-17.

References

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