How severe is CVE-2021-23403?

CVE-2021-23403 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-23403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23403?

CVE-2021-23403 affects Ts-nodash Project Ts-nodash. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23403?

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-2021-23403 published?

CVE-2021-23403 was published on 2021-07-02 and last updated on 2026-06-17.

CVE-2021-23403

CVE-2021-23403 is a high-severity vulnerability in Ts-nodash Project Ts-nodash with a CVSS 3.x base score of 7.3. 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-1321.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1321
Affected product: Ts-nodash Project Ts-nodash
Published: 2021-07-02
Last modified: 2026-06-17

Description

All versions of package ts-nodash are vulnerable to Prototype Pollution via the Merge() function due to lack of validation input.

Frequently asked questions

What is CVE-2021-23403?: All versions of package ts-nodash are vulnerable to Prototype Pollution via the Merge() function due to lack of validation input.
How severe is CVE-2021-23403?: CVE-2021-23403 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-23403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23403?: CVE-2021-23403 affects Ts-nodash Project Ts-nodash. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23403?: 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-2021-23403 published?: CVE-2021-23403 was published on 2021-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ts-nodash_project:ts-nodash:*:*:*:*:*:node.js:*:*

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