How severe is CVE-2022-21211?

CVE-2022-21211 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-21211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21211?

CVE-2022-21211 affects Posix Project Posix. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21211?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-21211 published?

CVE-2022-21211 was published on 2022-06-10 and last updated on 2026-06-17.

CVE-2022-21211

CVE-2022-21211 is a medium-severity vulnerability in Posix Project Posix with a CVSS 3.x base score of 5.9. 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-252.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 5.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-252
Affected product: Posix Project Posix
Published: 2022-06-10
Last modified: 2026-06-17

Description

This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.

Frequently asked questions

What is CVE-2022-21211?: This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.
How severe is CVE-2022-21211?: CVE-2022-21211 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-21211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21211?: CVE-2022-21211 affects Posix Project Posix. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21211?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-21211 published?: CVE-2022-21211 was published on 2022-06-10 and last updated on 2026-06-17.

References

https://snyk.io/vuln/SNYK-JS-POSIX-2400719

Affected products (1)

cpe:2.3:a:posix_project:posix:*:*:*:*:*:node.js:*:*

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