How severe is CVE-2021-23390?

CVE-2021-23390 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-23390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23390?

CVE-2021-23390 affects Totaljs Total4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23390?

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

When was CVE-2021-23390 published?

CVE-2021-23390 was published on 2021-07-12 and last updated on 2026-06-17.

CVE-2021-23390

CVE-2021-23390 is a critical-severity vulnerability in Totaljs Total4 with a CVSS 3.x base score of 9.8. 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Totaljs Total4
Published: 2021-07-12
Last modified: 2026-06-17

Description

The package total4 before 0.0.43 are vulnerable to Arbitrary Code Execution via the U.set() and U.get() functions.

Frequently asked questions

What is CVE-2021-23390?: The package total4 before 0.0.43 are vulnerable to Arbitrary Code Execution via the U.set() and U.get() functions.
How severe is CVE-2021-23390?: CVE-2021-23390 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-23390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23390?: CVE-2021-23390 affects Totaljs Total4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-23390 published?: CVE-2021-23390 was published on 2021-07-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:totaljs:total4:*:*:*:*:*:node.js:*:*

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